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138,Copy List with Random Pointer,36.4%,Medium,2.9916072330367776, https://leetcode.com/problems/copy-list-with-random-pointer
146,LRU Cache,33.2%,Medium,2.88011930741835, https://leetcode.com/problems/lru-cache
1396,Design Underground System,64.7%,Medium,2.7686313817999224, https://leetcode.com/problems/design-underground-system
430,Flatten a Multilevel Doubly Linked List,55.1%,Medium,2.699294019942542, https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list
200,Number of Islands,46.8%,Medium,2.5893928602940184, https://leetcode.com/problems/number-of-islands
445,Add Two Numbers II,54.5%,Medium,2.5005209232280814, https://leetcode.com/problems/add-two-numbers-ii
723,Candy Crush,69.2%,Medium,2.4433718804091535, https://leetcode.com/problems/candy-crush
394,Decode String,50.0%,Medium,2.4354178381724667, https://leetcode.com/problems/decode-string
582,Kill Process,60.8%,Medium,2.329004207705794, https://leetcode.com/problems/kill-process
1,Two Sum,45.6%,Easy,2.2663379529079926, https://leetcode.com/problems/two-sum
451,Sort Characters By Frequency,63.0%,Medium,2.214754567267123, https://leetcode.com/problems/sort-characters-by-frequency
2,Add Two Numbers,33.9%,Medium,2.2105161651535843, https://leetcode.com/problems/add-two-numbers
1169,Invalid Transactions,31.2%,Medium,2.1276788037634873, https://leetcode.com/problems/invalid-transactions
117,Populating Next Right Pointers in Each Node II,39.1%,Medium,2.118212486885331, https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
42,Trapping Rain Water,48.9%,Hard,2.0660776889450734, https://leetcode.com/problems/trapping-rain-water
20,Valid Parentheses,39.0%,Easy,2.0208637675689056, https://leetcode.com/problems/valid-parentheses
380,Insert Delete GetRandom O(1),47.5%,Medium,1.9093758419504783, https://leetcode.com/problems/insert-delete-getrandom-o1
155,Min Stack,44.5%,Easy,1.8753356079546997, https://leetcode.com/problems/min-stack
98,Validate Binary Search Tree,27.8%,Medium,1.8280334735241495, https://leetcode.com/problems/validate-binary-search-tree
253,Meeting Rooms II,45.7%,Medium,1.7748254445172882, https://leetcode.com/problems/meeting-rooms-ii
121,Best Time to Buy and Sell Stock,50.5%,Easy,1.7316498584399342, https://leetcode.com/problems/best-time-to-buy-and-sell-stock
387,First Unique Character in a String,53.4%,Easy,1.6717206372907538, https://leetcode.com/problems/first-unique-character-in-a-string
56,Merge Intervals,39.3%,Medium,1.6344853036753995, https://leetcode.com/problems/merge-intervals
214,Shortest Palindrome,29.8%,Hard,1.628304607593452, https://leetcode.com/problems/shortest-palindrome
1274,Number of Ships in a Rectangle,66.3%,Hard,1.6253239794553143, https://leetcode.com/problems/number-of-ships-in-a-rectangle
1029,Two City Scheduling,56.1%,Easy,1.6062408497394156, https://leetcode.com/problems/two-city-scheduling
283,Move Zeroes,57.8%,Easy,1.5700380214242422, https://leetcode.com/problems/move-zeroes
116,Populating Next Right Pointers in Each Node,45.2%,Medium,1.5282163044390433, https://leetcode.com/problems/populating-next-right-pointers-in-each-node
390,Elimination Game,44.5%,Medium,1.435519307483543, https://leetcode.com/problems/elimination-game
3,Longest Substring Without Repeating Characters,30.4%,Medium,1.3959826812294072, https://leetcode.com/problems/longest-substring-without-repeating-characters
23,Merge k Sorted Lists,40.2%,Hard,1.390362038117481, https://leetcode.com/problems/merge-k-sorted-lists
1209,Remove All Adjacent Duplicates in String II,56.9%,Medium,1.2788741124990537, https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii
463,Island Perimeter,65.7%,Easy,1.245274068255333, https://leetcode.com/problems/island-perimeter
242,Valid Anagram,56.9%,Easy,1.1337861426369056, https://leetcode.com/problems/valid-anagram
269,Alien Dictionary,33.3%,Hard,1.099252698552309, https://leetcode.com/problems/alien-dictionary
114,Flatten Binary Tree to Linked List,49.3%,Medium,1.0986122886681096, https://leetcode.com/problems/flatten-binary-tree-to-linked-list
139,Word Break,40.1%,Medium,1.0903842081598691, https://leetcode.com/problems/word-break
4,Median of Two Sorted Arrays,29.6%,Hard,1.0617282987657621, https://leetcode.com/problems/median-of-two-sorted-arrays
271,Encode and Decode Strings,31.5%,Medium,1.0528027526368156, https://leetcode.com/problems/encode-and-decode-strings
33,Search in Rotated Sorted Array,34.5%,Medium,1.0520357838367607, https://leetcode.com/problems/search-in-rotated-sorted-array
12,Integer to Roman,55.1%,Medium,1.0302007147147747, https://leetcode.com/problems/integer-to-roman
206,Reverse Linked List,62.5%,Easy,1.0194232916385328, https://leetcode.com/problems/reverse-linked-list
301,Remove Invalid Parentheses,43.3%,Hard,1.0163915378390016, https://leetcode.com/problems/remove-invalid-parentheses
21,Merge Two Sorted Lists,53.5%,Easy,0.9730025194287449, https://leetcode.com/problems/merge-two-sorted-lists
7,Reverse Integer,25.8%,Easy,0.9636538129651142, https://leetcode.com/problems/reverse-integer
69,Sqrt(x),33.9%,Easy,0.9425416082510271, https://leetcode.com/problems/sqrtx
628,Maximum Product of Three Numbers,47.1%,Easy,0.9179560111932162, https://leetcode.com/problems/maximum-product-of-three-numbers
15,3Sum,26.8%,Medium,0.9115464188984339, https://leetcode.com/problems/3sum
346,Moving Average from Data Stream,70.9%,Easy,0.893574774039618, https://leetcode.com/problems/moving-average-from-data-stream
105,Construct Binary Tree from Preorder and Inorder Traversal,48.8%,Medium,0.856966942738701, https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
554,Brick Wall,50.0%,Medium,0.8487112881843506, https://leetcode.com/problems/brick-wall
460,LFU Cache,34.2%,Hard,0.8452742509276767, https://leetcode.com/problems/lfu-cache
53,Maximum Subarray,46.5%,Easy,0.8338660450189812, https://leetcode.com/problems/maximum-subarray
692,Top K Frequent Words,51.8%,Medium,0.8219759071619612, https://leetcode.com/problems/top-k-frequent-words
5,Longest Palindromic Substring,29.5%,Medium,0.8154521489335768, https://leetcode.com/problems/longest-palindromic-substring
239,Sliding Window Maximum,43.0%,Hard,0.8060721931479718, https://leetcode.com/problems/sliding-window-maximum
295,Find Median from Data Stream,44.3%,Hard,0.7864008043695105, https://leetcode.com/problems/find-median-from-data-stream
62,Unique Paths,54.1%,Medium,0.7819517612115802, https://leetcode.com/problems/unique-paths
236,Lowest Common Ancestor of a Binary Tree,45.7%,Medium,0.7585897524597297, https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
54,Spiral Matrix,34.1%,Medium,0.7505169147393441, https://leetcode.com/problems/spiral-matrix
273,Integer to English Words,27.1%,Hard,0.7404748586772619, https://leetcode.com/problems/integer-to-english-words
611,Valid Triangle Number,48.4%,Medium,0.7357067949787413, https://leetcode.com/problems/valid-triangle-number
160,Intersection of Two Linked Lists,40.6%,Easy,0.7095335003665627, https://leetcode.com/problems/intersection-of-two-linked-lists
332,Reconstruct Itinerary,36.7%,Medium,0.6934933810134637, https://leetcode.com/problems/reconstruct-itinerary
987,Vertical Order Traversal of a Binary Tree,36.6%,Medium,0.6653429641530142, https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree
173,Binary Search Tree Iterator,56.6%,Medium,0.6626352388032212, https://leetcode.com/problems/binary-search-tree-iterator
10,Regular Expression Matching,26.8%,Hard,0.6273817982285409, https://leetcode.com/problems/regular-expression-matching
122,Best Time to Buy and Sell Stock II,57.0%,Easy,0.620692101344523, https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
49,Group Anagrams,56.9%,Medium,0.6192590691619644, https://leetcode.com/problems/group-anagrams
797,All Paths From Source to Target,77.9%,Medium,0.6133054173259477, https://leetcode.com/problems/all-paths-from-source-to-target
102,Binary Tree Level Order Traversal,54.6%,Medium,0.598984719563006, https://leetcode.com/problems/binary-tree-level-order-traversal
127,Word Ladder,29.6%,Medium,0.5839478885949534, https://leetcode.com/problems/word-ladder
443,String Compression,41.3%,Easy,0.5809942743419542, https://leetcode.com/problems/string-compression
88,Merge Sorted Array,39.4%,Easy,0.571985667665598, https://leetcode.com/problems/merge-sorted-array
314,Binary Tree Vertical Order Traversal,45.3%,Medium,0.5697543914580919, https://leetcode.com/problems/binary-tree-vertical-order-traversal
384,Shuffle an Array,52.8%,Medium,0.5613156759328372, https://leetcode.com/problems/shuffle-an-array
235,Lowest Common Ancestor of a Binary Search Tree,49.9%,Easy,0.5565464902832835, https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree
322,Coin Change,35.5%,Medium,0.5515361644679891, https://leetcode.com/problems/coin-change
78,Subsets,62.0%,Medium,0.5447142447216986, https://leetcode.com/problems/subsets
1472,Design Browser History,64.6%,Medium,0.5365781198684054, https://leetcode.com/problems/design-browser-history
399,Evaluate Division,51.6%,Medium,0.5332723866487983, https://leetcode.com/problems/evaluate-division
140,Word Break II,32.6%,Hard,0.5270660323324061, https://leetcode.com/problems/word-break-ii
72,Edit Distance,44.8%,Hard,0.4973447790261514, https://leetcode.com/problems/edit-distance
199,Binary Tree Right Side View,54.1%,Medium,0.48753322716717645, https://leetcode.com/problems/binary-tree-right-side-view
662,Maximum Width of Binary Tree,41.0%,Medium,0.4763908360365309, https://leetcode.com/problems/maximum-width-of-binary-tree
759,Employee Free Time,66.3%,Hard,0.4763656648250958, https://leetcode.com/problems/employee-free-time
84,Largest Rectangle in Histogram,35.2%,Hard,0.47303377627978027, https://leetcode.com/problems/largest-rectangle-in-histogram
8,String to Integer (atoi),15.4%,Medium,0.4660655155190756, https://leetcode.com/problems/string-to-integer-atoi
128,Longest Consecutive Sequence,45.1%,Hard,0.4586585434961303, https://leetcode.com/problems/longest-consecutive-sequence
41,First Missing Positive,32.0%,Hard,0.4577280774627401, https://leetcode.com/problems/first-missing-positive
162,Find Peak Element,43.3%,Medium,0.4542122961558814, https://leetcode.com/problems/find-peak-element
739,Daily Temperatures,63.3%,Medium,0.4492773337550074, https://leetcode.com/problems/daily-temperatures
328,Odd Even Linked List,55.7%,Medium,0.44107885769261934, https://leetcode.com/problems/odd-even-linked-list
126,Word Ladder II,22.1%,Hard,0.43777160210436394, https://leetcode.com/problems/word-ladder-ii
50,Pow(x, n),30.3%,Medium,0.4274653596092084, https://leetcode.com/problems/powx-n
535,Encode and Decode TinyURL,79.9%,Medium,0.4221173972425086, https://leetcode.com/problems/encode-and-decode-tinyurl
347,Top K Frequent Elements,61.2%,Medium,0.4113452979974663, https://leetcode.com/problems/top-k-frequent-elements
234,Palindrome Linked List,39.3%,Easy,0.40610862095331074, https://leetcode.com/problems/palindrome-linked-list
488,Zuma Game,39.9%,Hard,0.3999856423435388, https://leetcode.com/problems/zuma-game
118,Pascal's Triangle,52.5%,Easy,0.3983282893707838, https://leetcode.com/problems/pascals-triangle
31,Next Permutation,32.6%,Medium,0.3965135773768611, https://leetcode.com/problems/next-permutation
11,Container With Most Water,50.8%,Medium,0.3920877580285051, https://leetcode.com/problems/container-with-most-water
496,Next Greater Element I,63.8%,Easy,0.39096401741736453, https://leetcode.com/problems/next-greater-element-i
171,Excel Sheet Column Number,55.9%,Easy,0.3891015365515057, https://leetcode.com/problems/excel-sheet-column-number
9,Palindrome Number,48.4%,Easy,0.3889248192216875, https://leetcode.com/problems/palindrome-number
1047,Remove All Adjacent Duplicates In String,68.6%,Easy,0.38744859425846845, https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string
34,Find First and Last Position of Element in Sorted Array,36.2%,Medium,0.3847852205330874, https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array
349,Intersection of Two Arrays,62.5%,Easy,0.3823387899165356, https://leetcode.com/problems/intersection-of-two-arrays
311,Sparse Matrix Multiplication,61.9%,Medium,0.37117603462953225, https://leetcode.com/problems/sparse-matrix-multiplication
79,Word Search,35.6%,Medium,0.355241060704579, https://leetcode.com/problems/word-search
44,Wildcard Matching,24.7%,Hard,0.34881383996175425, https://leetcode.com/problems/wildcard-matching
362,Design Hit Counter,63.7%,Medium,0.34451909789108437, https://leetcode.com/problems/design-hit-counter
230,Kth Smallest Element in a BST,60.2%,Medium,0.3413184800841155, https://leetcode.com/problems/kth-smallest-element-in-a-bst
124,Binary Tree Maximum Path Sum,34.3%,Hard,0.33702679091242466, https://leetcode.com/problems/binary-tree-maximum-path-sum
268,Missing Number,51.7%,Easy,0.3338128467131867, https://leetcode.com/problems/missing-number
64,Minimum Path Sum,54.5%,Medium,0.3317195432884912, https://leetcode.com/problems/minimum-path-sum
215,Kth Largest Element in an Array,55.4%,Medium,0.3300278321382259, https://leetcode.com/problems/kth-largest-element-in-an-array
353,Design Snake Game,34.2%,Medium,0.32931497055013925, https://leetcode.com/problems/design-snake-game
46,Permutations,63.5%,Medium,0.32304289477761106, https://leetcode.com/problems/permutations
221,Maximal Square,37.7%,Medium,0.3057737602882765, https://leetcode.com/problems/maximal-square
17,Letter Combinations of a Phone Number,46.8%,Medium,0.30552675752628056, https://leetcode.com/problems/letter-combinations-of-a-phone-number
205,Isomorphic Strings,39.8%,Easy,0.30101800626340847, https://leetcode.com/problems/isomorphic-strings
75,Sort Colors,47.3%,Medium,0.2778743740687611, https://leetcode.com/problems/sort-colors
695,Max Area of Island,62.7%,Medium,0.2770125235595406, https://leetcode.com/problems/max-area-of-island
136,Single Number,65.5%,Easy,0.27522969174444734, https://leetcode.com/problems/single-number
22,Generate Parentheses,62.7%,Medium,0.274428104404814, https://leetcode.com/problems/generate-parentheses
229,Majority Element II,35.6%,Medium,0.2683771567744578, https://leetcode.com/problems/majority-element-ii
503,Next Greater Element II,56.5%,Medium,0.26590939545778536, https://leetcode.com/problems/next-greater-element-ii
209,Minimum Size Subarray Sum,38.2%,Medium,0.26557641498817536, https://leetcode.com/problems/minimum-size-subarray-sum
694,Number of Distinct Islands,56.0%,Medium,0.26236426446749106, https://leetcode.com/problems/number-of-distinct-islands
422,Valid Word Square,37.7%,Easy,0.2578291093020998, https://leetcode.com/problems/valid-word-square
252,Meeting Rooms,54.6%,Easy,0.2539330877151399, https://leetcode.com/problems/meeting-rooms
286,Walls and Gates,54.5%,Medium,0.2531417471996048, https://leetcode.com/problems/walls-and-gates
48,Rotate Image,56.7%,Medium,0.2525907526405108, https://leetcode.com/problems/rotate-image
821,Shortest Distance to a Character,66.9%,Easy,0.24320527953164725, https://leetcode.com/problems/shortest-distance-to-a-character
240,Search a 2D Matrix II,43.2%,Medium,0.24218097481422138, https://leetcode.com/problems/search-a-2d-matrix-ii
716,Max Stack,42.6%,Easy,0.24108416003009112, https://leetcode.com/problems/max-stack
85,Maximal Rectangle,37.7%,Hard,0.2404427185770219, https://leetcode.com/problems/maximal-rectangle
63,Unique Paths II,34.6%,Medium,0.2348446787507317, https://leetcode.com/problems/unique-paths-ii
76,Minimum Window Substring,34.6%,Hard,0.23436338587849237, https://leetcode.com/problems/minimum-window-substring
572,Subtree of Another Tree,44.1%,Easy,0.23328636844031944, https://leetcode.com/problems/subtree-of-another-tree
151,Reverse Words in a String,21.9%,Medium,0.23114347137583938, https://leetcode.com/problems/reverse-words-in-a-string
412,Fizz Buzz,62.3%,Easy,0.23023806672070082, https://leetcode.com/problems/fizz-buzz
652,Find Duplicate Subtrees,50.2%,Medium,0.23015822831359434, https://leetcode.com/problems/find-duplicate-subtrees
924,Minimize Malware Spread,42.0%,Hard,0.22884157242884745, https://leetcode.com/problems/minimize-malware-spread
91,Decode Ways,24.7%,Medium,0.2254754606491885, https://leetcode.com/problems/decode-ways
238,Product of Array Except Self,60.1%,Medium,0.22477655808124566, https://leetcode.com/problems/product-of-array-except-self
1223,Dice Roll Simulation,45.6%,Medium,0.2166710368085923, https://leetcode.com/problems/dice-roll-simulation
560,Subarray Sum Equals K,43.9%,Medium,0.21610695147886494, https://leetcode.com/problems/subarray-sum-equals-k
442,Find All Duplicates in an Array,67.8%,Medium,0.21334822899856468, https://leetcode.com/problems/find-all-duplicates-in-an-array
6,ZigZag Conversion,36.3%,Medium,0.21040551802808702, https://leetcode.com/problems/zigzag-conversion
287,Find the Duplicate Number,55.5%,Medium,0.20950804936372536, https://leetcode.com/problems/find-the-duplicate-number
315,Count of Smaller Numbers After Self,41.5%,Hard,0.20806843787404064, https://leetcode.com/problems/count-of-smaller-numbers-after-self
232,Implement Queue using Stacks,49.6%,Easy,0.20615437352136948, https://leetcode.com/problems/implement-queue-using-stacks
208,Implement Trie (Prefix Tree),49.4%,Medium,0.20593713931590088, https://leetcode.com/problems/implement-trie-prefix-tree
16,3Sum Closest,46.0%,Medium,0.2058081329110988, https://leetcode.com/problems/3sum-closest
513,Find Bottom Left Tree Value,61.5%,Medium,0.20328581918106378, https://leetcode.com/problems/find-bottom-left-tree-value
543,Diameter of Binary Tree,48.4%,Easy,0.2027481163433401, https://leetcode.com/problems/diameter-of-binary-tree
836,Rectangle Overlap,48.6%,Easy,0.19944370144318244, https://leetcode.com/problems/rectangle-overlap
13,Roman to Integer,55.7%,Easy,0.19870163716069, https://leetcode.com/problems/roman-to-integer
510,Inorder Successor in BST II,58.0%,Medium,0.19714257713870645, https://leetcode.com/problems/inorder-successor-in-bst-ii
329,Longest Increasing Path in a Matrix,43.4%,Hard,0.1954447382872236, https://leetcode.com/problems/longest-increasing-path-in-a-matrix
1060,Missing Element in Sorted Array,54.5%,Medium,0.1950605825713844, https://leetcode.com/problems/missing-element-in-sorted-array
94,Binary Tree Inorder Traversal,63.3%,Medium,0.1948180665300998, https://leetcode.com/problems/binary-tree-inorder-traversal
120,Triangle,44.2%,Medium,0.19325424809414601, https://leetcode.com/problems/triangle
92,Reverse Linked List II,38.8%,Medium,0.19248981022320735, https://leetcode.com/problems/reverse-linked-list-ii
153,Find Minimum in Rotated Sorted Array,45.1%,Medium,0.191995528322351, https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
207,Course Schedule,43.1%,Medium,0.19082802919680183, https://leetcode.com/problems/course-schedule
402,Remove K Digits,28.4%,Medium,0.18924199963852842, https://leetcode.com/problems/remove-k-digits
658,Find K Closest Elements,40.9%,Medium,0.18663941293482042, https://leetcode.com/problems/find-k-closest-elements
518,Coin Change 2,50.2%,Medium,0.18373876827436816, https://leetcode.com/problems/coin-change-2
889,Construct Binary Tree from Preorder and Postorder Traversal,66.2%,Medium,0.18315872720701828, https://leetcode.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal
70,Climbing Stairs,47.8%,Easy,0.1820258821345787, https://leetcode.com/problems/climbing-stairs
226,Invert Binary Tree,65.0%,Easy,0.18135450553395235, https://leetcode.com/problems/invert-binary-tree
19,Remove Nth Node From End of List,35.2%,Medium,0.17998225417577363, https://leetcode.com/problems/remove-nth-node-from-end-of-list
203,Remove Linked List Elements,38.6%,Easy,0.17950766176348673, https://leetcode.com/problems/remove-linked-list-elements
1244,Design A Leaderboard,60.7%,Medium,0.17763094743610072, https://leetcode.com/problems/design-a-leaderboard
202,Happy Number,50.4%,Easy,0.17408932588103054, https://leetcode.com/problems/happy-number
1249,Minimum Remove to Make Valid Parentheses,62.5%,Medium,0.17148553745267525, https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses
97,Interleaving String,31.5%,Hard,0.17070662167607636, https://leetcode.com/problems/interleaving-string
344,Reverse String,68.5%,Easy,0.16907996884887766, https://leetcode.com/problems/reverse-string
971,Flip Binary Tree To Match Preorder Traversal,45.7%,Medium,0.1670540846631662, https://leetcode.com/problems/flip-binary-tree-to-match-preorder-traversal
529,Minesweeper,59.1%,Medium,0.16635770580494058, https://leetcode.com/problems/minesweeper
727,Minimum Window Subsequence,41.8%,Hard,0.15970111035790735, https://leetcode.com/problems/minimum-window-subsequence
101,Symmetric Tree,46.8%,Easy,0.15457702816029933, https://leetcode.com/problems/symmetric-tree
414,Third Maximum Number,30.5%,Easy,0.15407631103237035, https://leetcode.com/problems/third-maximum-number
417,Pacific Atlantic Water Flow,41.1%,Medium,0.15226921172755276, https://leetcode.com/problems/pacific-atlantic-water-flow
470,Implement Rand10() Using Rand7(),46.3%,Medium,0.15154989812720093, https://leetcode.com/problems/implement-rand10-using-rand7
386,Lexicographical Numbers,51.6%,Medium,0.14854271203296188, https://leetcode.com/problems/lexicographical-numbers
504,Base 7,46.2%,Easy,0.14612656455721032, https://leetcode.com/problems/base-7
24,Swap Nodes in Pairs,50.4%,Medium,0.14499222491243005, https://leetcode.com/problems/swap-nodes-in-pairs
237,Delete Node in a Linked List,63.8%,Easy,0.14499031042859406, https://leetcode.com/problems/delete-node-in-a-linked-list
852,Peak Index in a Mountain Array,71.6%,Easy,0.1445812288111076, https://leetcode.com/problems/peak-index-in-a-mountain-array
415,Add Strings,47.5%,Easy,0.14343082219506165, https://leetcode.com/problems/add-strings
426,Convert Binary Search Tree to Sorted Doubly Linked List,59.1%,Medium,0.14252878462127264, https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list
348,Design Tic-Tac-Toe,54.3%,Medium,0.14252878462127264, https://leetcode.com/problems/design-tic-tac-toe
188,Best Time to Buy and Sell Stock IV,28.0%,Hard,0.1396533313293086, https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv
225,Implement Stack using Queues,45.1%,Easy,0.1390589799907463, https://leetcode.com/problems/implement-stack-using-queues
250,Count Univalue Subtrees,52.0%,Medium,0.13767409129953323, https://leetcode.com/problems/count-univalue-subtrees
71,Simplify Path,32.6%,Medium,0.13762137787604775, https://leetcode.com/problems/simplify-path
565,Array Nesting,55.5%,Medium,0.13762137787604775, https://leetcode.com/problems/array-nesting
397,Integer Replacement,32.9%,Medium,0.13720112151348504, https://leetcode.com/problems/integer-replacement
99,Recover Binary Search Tree,39.7%,Hard,0.1363765523041528, https://leetcode.com/problems/recover-binary-search-tree
81,Search in Rotated Sorted Array II,33.0%,Medium,0.13455967035008862, https://leetcode.com/problems/search-in-rotated-sorted-array-ii
678,Valid Parenthesis String,31.0%,Medium,0.13417736429600724, https://leetcode.com/problems/valid-parenthesis-string
125,Valid Palindrome,36.7%,Easy,0.13416684727631417, https://leetcode.com/problems/valid-palindrome
378,Kth Smallest Element in a Sorted Matrix,54.3%,Medium,0.13397014948713715, https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix
1347,Minimum Number of Steps to Make Two Strings Anagram,74.7%,Medium,0.13375498122243565, https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram
123,Best Time to Buy and Sell Stock III,37.5%,Hard,0.12991500860874672, https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii
359,Logger Rate Limiter,70.8%,Easy,0.1248502028794759, https://leetcode.com/problems/logger-rate-limiter
109,Convert Sorted List to Binary Search Tree,47.7%,Medium,0.12302181451266285, https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree
228,Summary Ranges,39.5%,Medium,0.1207191114343526, https://leetcode.com/problems/summary-ranges
404,Sum of Left Leaves,50.9%,Easy,0.1193071581156751, https://leetcode.com/problems/sum-of-left-leaves
341,Flatten Nested List Iterator,52.9%,Medium,0.11879160861126825, https://leetcode.com/problems/flatten-nested-list-iterator
1054,Distant Barcodes,43.2%,Medium,0.11855973472455572, https://leetcode.com/problems/distant-barcodes
103,Binary Tree Zigzag Level Order Traversal,48.3%,Medium,0.11648551004070631, https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
435,Non-overlapping Intervals,42.9%,Medium,0.1158164666843426, https://leetcode.com/problems/non-overlapping-intervals
61,Rotate List,30.0%,Medium,0.11528615545779625, https://leetcode.com/problems/rotate-list
28,Implement strStr(),34.5%,Easy,0.11289821506454988, https://leetcode.com/problems/implement-strstr
721,Accounts Merge,48.8%,Medium,0.11257939199174459, https://leetcode.com/problems/accounts-merge
708,Insert into a Sorted Circular Linked List,31.6%,Medium,0.11219725014953141, https://leetcode.com/problems/insert-into-a-sorted-circular-linked-list
532,K-diff Pairs in an Array,31.6%,Easy,0.111723209445655, https://leetcode.com/problems/k-diff-pairs-in-an-array
82,Remove Duplicates from Sorted List II,36.8%,Medium,0.1110882064011508, https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii
1188,Design Bounded Blocking Queue,70.5%,Medium,0.11030454201470608, https://leetcode.com/problems/design-bounded-blocking-queue
198,House Robber,42.0%,Easy,0.10785152815546674, https://leetcode.com/problems/house-robber
108,Convert Sorted Array to Binary Search Tree,57.9%,Easy,0.10686314554236129, https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree
112,Path Sum,41.2%,Easy,0.10531937947649221, https://leetcode.com/problems/path-sum
26,Remove Duplicates from Sorted Array,45.1%,Easy,0.10424167132184688, https://leetcode.com/problems/remove-duplicates-from-sorted-array
289,Game of Life,54.5%,Medium,0.10365526175211173, https://leetcode.com/problems/game-of-life
336,Palindrome Pairs,33.7%,Hard,0.10259559233600947, https://leetcode.com/problems/palindrome-pairs
141,Linked List Cycle,41.1%,Easy,0.10063328674952829, https://leetcode.com/problems/linked-list-cycle
90,Subsets II,47.1%,Medium,0.09830555874512009, https://leetcode.com/problems/subsets-ii
642,Design Search Autocomplete System,44.7%,Hard,0.09500811062818718, https://leetcode.com/problems/design-search-autocomplete-system
567,Permutation in String,44.4%,Medium,0.08995633353390375, https://leetcode.com/problems/permutation-in-string
285,Inorder Successor in BST,40.4%,Medium,0.08649364464568089, https://leetcode.com/problems/inorder-successor-in-bst
991,Broken Calculator,45.6%,Medium,0.08515780834030685, https://leetcode.com/problems/broken-calculator
131,Palindrome Partitioning,47.5%,Medium,0.08388550716227433, https://leetcode.com/problems/palindrome-partitioning
297,Serialize and Deserialize Binary Tree,47.5%,Hard,0.0834242216674795, https://leetcode.com/problems/serialize-and-deserialize-binary-tree
204,Count Primes,31.5%,Easy,0.08336741437414971, https://leetcode.com/problems/count-primes
857,Minimum Cost to Hire K Workers,49.6%,Hard,0.08320805808821628, https://leetcode.com/problems/minimum-cost-to-hire-k-workers
557,Reverse Words in a String III,69.8%,Easy,0.0828837318214325, https://leetcode.com/problems/reverse-words-in-a-string-iii
813,Largest Sum of Averages,49.9%,Medium,0.08201315166083516, https://leetcode.com/problems/largest-sum-of-averages
737,Sentence Similarity II,45.8%,Medium,0.08167803101426718, https://leetcode.com/problems/sentence-similarity-ii
74,Search a 2D Matrix,36.5%,Medium,0.08108897817576358, https://leetcode.com/problems/search-a-2d-matrix
448,Find All Numbers Disappeared in an Array,55.9%,Easy,0.08099584515633794, https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array
96,Unique Binary Search Trees,52.9%,Medium,0.08025695513016742, https://leetcode.com/problems/unique-binary-search-trees
673,Number of Longest Increasing Subsequence,35.7%,Medium,0.08025695513016742, https://leetcode.com/problems/number-of-longest-increasing-subsequence
303,Range Sum Query - Immutable,44.7%,Easy,0.08001707486353822, https://leetcode.com/problems/range-sum-query-immutable
392,Is Subsequence,49.2%,Easy,0.07897107508821988, https://leetcode.com/problems/is-subsequence
784,Letter Case Permutation,64.6%,Medium,0.0787033338274549, https://leetcode.com/problems/letter-case-permutation
189,Rotate Array,34.7%,Easy,0.07859731751631634, https://leetcode.com/problems/rotate-array
1297,Maximum Number of Occurrences of a Substring,47.3%,Medium,0.07770898432731625, https://leetcode.com/problems/maximum-number-of-occurrences-of-a-substring
55,Jump Game,34.6%,Medium,0.07748307858552587, https://leetcode.com/problems/jump-game
1155,Number of Dice Rolls With Target Sum,49.0%,Medium,0.07356256717701673, https://leetcode.com/problems/number-of-dice-rolls-with-target-sum
450,Delete Node in a BST,43.1%,Medium,0.07216836682371046, https://leetcode.com/problems/delete-node-in-a-bst
35,Search Insert Position,42.6%,Easy,0.07187646029497265, https://leetcode.com/problems/search-insert-position
1114,Print in Order,65.7%,Easy,0.0700675626167169, https://leetcode.com/problems/print-in-order
432,All O`one Data Structure,32.4%,Hard,0.06887402901251127, https://leetcode.com/problems/all-oone-data-structure
338,Counting Bits,69.5%,Medium,0.06616169008990747, https://leetcode.com/problems/counting-bits
1145,Binary Tree Coloring Game,51.2%,Medium,0.06592172080482424, https://leetcode.com/problems/binary-tree-coloring-game
167,Two Sum II - Input array is sorted,54.1%,Easy,0.06546140041370939, https://leetcode.com/problems/two-sum-ii-input-array-is-sorted
14,Longest Common Prefix,35.4%,Easy,0.06517750377430989, https://leetcode.com/problems/longest-common-prefix
846,Hand of Straights,54.2%,Medium,0.06472423940349638, https://leetcode.com/problems/hand-of-straights
1105,Filling Bookcase Shelves,58.1%,Medium,0.06464285626208545, https://leetcode.com/problems/filling-bookcase-shelves
36,Valid Sudoku,48.7%,Medium,0.06350219850936348, https://leetcode.com/problems/valid-sudoku
413,Arithmetic Slices,57.9%,Medium,0.06286986221654821, https://leetcode.com/problems/arithmetic-slices
350,Intersection of Two Arrays II,51.4%,Easy,0.06202949919751832, https://leetcode.com/problems/intersection-of-two-arrays-ii
47,Permutations II,46.4%,Medium,0.05897935516253239, https://leetcode.com/problems/permutations-ii
516,Longest Palindromic Subsequence,53.2%,Medium,0.058432099871092734, https://leetcode.com/problems/longest-palindromic-subsequence
32,Longest Valid Parentheses,28.4%,Hard,0.0556316959861487, https://leetcode.com/problems/longest-valid-parentheses
30,Substring with Concatenation of All Words,25.4%,Hard,0.05509349054082484, https://leetcode.com/problems/substring-with-concatenation-of-all-words
149,Max Points on a Line,16.9%,Hard,0.0550597771830274, https://leetcode.com/problems/max-points-on-a-line
222,Count Complete Tree Nodes,46.8%,Medium,0.05492114472894792, https://leetcode.com/problems/count-complete-tree-nodes
752,Open the Lock,51.8%,Medium,0.05449289949671372, https://leetcode.com/problems/open-the-lock
703,Kth Largest Element in a Stream,49.7%,Easy,0.054472280837981495, https://leetcode.com/problems/kth-largest-element-in-a-stream
724,Find Pivot Index,44.0%,Easy,0.05428741283782842, https://leetcode.com/problems/find-pivot-index
714,Best Time to Buy and Sell Stock with Transaction Fee,54.7%,Medium,0.05377639678080413, https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee
395,Longest Substring with At Least K Repeating Characters,41.4%,Medium,0.05371219359052555, https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters
1312,Minimum Insertion Steps to Make a String Palindrome,58.1%,Hard,0.050261834780888255, https://leetcode.com/problems/minimum-insertion-steps-to-make-a-string-palindrome
216,Combination Sum III,56.6%,Medium,0.05017774958571902, https://leetcode.com/problems/combination-sum-iii
219,Contains Duplicate II,37.7%,Easy,0.05012010405957234, https://leetcode.com/problems/contains-duplicate-ii
129,Sum Root to Leaf Numbers,49.1%,Medium,0.050010420574661374, https://leetcode.com/problems/sum-root-to-leaf-numbers
152,Maximum Product Subarray,31.7%,Medium,0.04922388062576129, https://leetcode.com/problems/maximum-product-subarray
437,Path Sum III,47.2%,Medium,0.047656426639019575, https://leetcode.com/problems/path-sum-iii
986,Interval List Intersections,67.3%,Medium,0.04703983015489417, https://leetcode.com/problems/interval-list-intersections
556,Next Greater Element III,31.7%,Medium,0.04679216150675895, https://leetcode.com/problems/next-greater-element-iii
933,Number of Recent Calls,71.9%,Easy,0.046737477851689815, https://leetcode.com/problems/number-of-recent-calls
978,Longest Turbulent Subarray,46.6%,Medium,0.046737477851689815, https://leetcode.com/problems/longest-turbulent-subarray
176,Second Highest Salary,31.6%,Easy,0.045338680589061736, https://leetcode.com/problems/second-highest-salary
733,Flood Fill,55.3%,Easy,0.04413292021115189, https://leetcode.com/problems/flood-fill
104,Maximum Depth of Binary Tree,66.0%,Easy,0.043698924213377836, https://leetcode.com/problems/maximum-depth-of-binary-tree
895,Maximum Frequency Stack,60.6%,Hard,0.04329680575332419, https://leetcode.com/problems/maximum-frequency-stack
110,Balanced Binary Tree,43.5%,Easy,0.04313244044957316, https://leetcode.com/problems/balanced-binary-tree
540,Single Element in a Sorted Array,57.9%,Medium,0.042721256704769804, https://leetcode.com/problems/single-element-in-a-sorted-array
787,Cheapest Flights Within K Stops,39.3%,Medium,0.04186657939278993, https://leetcode.com/problems/cheapest-flights-within-k-stops
29,Divide Two Integers,16.4%,Medium,0.04159641425367403, https://leetcode.com/problems/divide-two-integers
258,Add Digits,57.6%,Easy,0.04107874349984602, https://leetcode.com/problems/add-digits
292,Nim Game,54.9%,Easy,0.03996979643236185, https://leetcode.com/problems/nim-game
212,Word Search II,34.9%,Hard,0.03881156536434583, https://leetcode.com/problems/word-search-ii
18,4Sum,33.7%,Medium,0.03880215185647971, https://leetcode.com/problems/4sum
993,Cousins in Binary Tree,52.0%,Easy,0.03876454345024432, https://leetcode.com/problems/cousins-in-binary-tree
270,Closest Binary Search Tree Value,48.5%,Easy,0.03812405784173832, https://leetcode.com/problems/closest-binary-search-tree-value
144,Binary Tree Preorder Traversal,55.7%,Medium,0.03751377610149742, https://leetcode.com/problems/binary-tree-preorder-traversal
646,Maximum Length of Pair Chain,51.9%,Medium,0.036870535808327706, https://leetcode.com/problems/maximum-length-of-pair-chain
340,Longest Substring with At Most K Distinct Characters,44.1%,Hard,0.035917667750755534, https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters
650,2 Keys Keyboard,49.2%,Medium,0.035910501305770864, https://leetcode.com/problems/2-keys-keyboard
334,Increasing Triplet Subsequence,40.0%,Medium,0.03577488021091517, https://leetcode.com/problems/increasing-triplet-subsequence
595,Big Countries,77.3%,Easy,0.03475253199083958, https://leetcode.com/problems/big-countries
1002,Find Common Characters,67.6%,Easy,0.03404262162737441, https://leetcode.com/problems/find-common-characters
217,Contains Duplicate,56.0%,Easy,0.03367321510658789, https://leetcode.com/problems/contains-duplicate
274,H-Index,36.1%,Medium,0.03364488914272426, https://leetcode.com/problems/h-index
1123,Lowest Common Ancestor of Deepest Leaves,66.8%,Medium,0.03147388037973136, https://leetcode.com/problems/lowest-common-ancestor-of-deepest-leaves
38,Count and Say,44.6%,Easy,0.030956234663467107, https://leetcode.com/problems/count-and-say
581,Shortest Unsorted Continuous Subarray,31.1%,Easy,0.029773949243192512, https://leetcode.com/problems/shortest-unsorted-continuous-subarray
66,Plus One,43.0%,Easy,0.028982869090985654, https://leetcode.com/problems/plus-one
147,Insertion Sort List,41.1%,Medium,0.028675799976666333, https://leetcode.com/problems/insertion-sort-list
621,Task Scheduler,50.1%,Medium,0.028315771352780777, https://leetcode.com/problems/task-scheduler
547,Friend Circles,58.6%,Medium,0.027307522052851193, https://leetcode.com/problems/friend-circles
310,Minimum Height Trees,32.3%,Medium,0.02446605215440636, https://leetcode.com/problems/minimum-height-trees
210,Course Schedule II,40.7%,Medium,0.023133880315464483, https://leetcode.com/problems/course-schedule-ii
39,Combination Sum,56.1%,Medium,0.02267028230338623, https://leetcode.com/problems/combination-sum
113,Path Sum II,46.7%,Medium,0.021882711249507664, https://leetcode.com/problems/path-sum-ii
40,Combination Sum II,48.2%,Medium,0.021424290044083395, https://leetcode.com/problems/combination-sum-ii
278,First Bad Version,35.7%,Easy,0.021394050366625766, https://leetcode.com/problems/first-bad-version
224,Basic Calculator,36.8%,Hard,0.020965128465044926, https://leetcode.com/problems/basic-calculator
424,Longest Repeating Character Replacement,47.0%,Medium,0.020461071871340063, https://leetcode.com/problems/longest-repeating-character-replacement
617,Merge Two Binary Trees,74.1%,Easy,0.018496211633622316, https://leetcode.com/problems/merge-two-binary-trees
438,Find All Anagrams in a String,43.3%,Medium,0.01819334596120571, https://leetcode.com/problems/find-all-anagrams-in-a-string
406,Queue Reconstruction by Height,66.9%,Medium,0.01774669468133533, https://leetcode.com/problems/queue-reconstruction-by-height
863,All Nodes Distance K in Binary Tree,55.4%,Medium,0.01695674371877865, https://leetcode.com/problems/all-nodes-distance-k-in-binary-tree
1025,Divisor Game,66.3%,Easy,0.015015297119995507, https://leetcode.com/problems/divisor-game
912,Sort an Array,63.9%,Medium,0.01443026482902881, https://leetcode.com/problems/sort-an-array
27,Remove Element,48.2%,Easy,0.01413451093490476, https://leetcode.com/problems/remove-element
100,Same Tree,53.4%,Easy,0.012601237835529503, https://leetcode.com/problems/same-tree
172,Factorial Trailing Zeroes,37.8%,Easy,0.012326812480658571, https://leetcode.com/problems/factorial-trailing-zeroes
957,Prison Cells After N Days,40.7%,Medium,0.010986103354595014, https://leetcode.com/problems/prison-cells-after-n-days
559,Maximum Depth of N-ary Tree,68.7%,Easy,0.010974047031976715, https://leetcode.com/problems/maximum-depth-of-n-ary-tree
746,Min Cost Climbing Stairs,50.3%,Easy,0.009818439209289494, https://leetcode.com/problems/min-cost-climbing-stairs
106,Construct Binary Tree from Inorder and Postorder Traversal,47.2%,Medium,0.009328969762346678, https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal
977,Squares of a Sorted Array,72.1%,Easy,0.008733679968754604, https://leetcode.com/problems/squares-of-a-sorted-array
1480,Running Sum of 1d Array,90.5%,Easy,0.0026196884456014947, https://leetcode.com/problems/running-sum-of-1d-array
266,Palindrome Permutation,61.9%,Easy,0, https://leetcode.com/problems/palindrome-permutation
158,Read N Characters Given Read4 II - Call multiple times,33.8%,Hard,0, https://leetcode.com/problems/read-n-characters-given-read4-ii-call-multiple-times
570,Managers with at Least 5 Direct Reports,66.0%,Medium,0, https://leetcode.com/problems/managers-with-at-least-5-direct-reports
669,Trim a Binary Search Tree,63.0%,Easy,0, https://leetcode.com/problems/trim-a-binary-search-tree
749,Contain Virus,44.6%,Hard,0, https://leetcode.com/problems/contain-virus
1104,Path In Zigzag Labelled Binary Tree,72.0%,Medium,0, https://leetcode.com/problems/path-in-zigzag-labelled-binary-tree
1478,Allocate Mailboxes,54.9%,Hard,0, https://leetcode.com/problems/allocate-mailboxes
1 138 Copy List with Random Pointer 36.4% Medium 2.9916072330367776 https://leetcode.com/problems/copy-list-with-random-pointer
2 146 LRU Cache 33.2% Medium 2.88011930741835 https://leetcode.com/problems/lru-cache
3 1396 Design Underground System 64.7% Medium 2.7686313817999224 https://leetcode.com/problems/design-underground-system
4 430 Flatten a Multilevel Doubly Linked List 55.1% Medium 2.699294019942542 https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list
5 200 Number of Islands 46.8% Medium 2.5893928602940184 https://leetcode.com/problems/number-of-islands
6 445 Add Two Numbers II 54.5% Medium 2.5005209232280814 https://leetcode.com/problems/add-two-numbers-ii
7 723 Candy Crush 69.2% Medium 2.4433718804091535 https://leetcode.com/problems/candy-crush
8 394 Decode String 50.0% Medium 2.4354178381724667 https://leetcode.com/problems/decode-string
9 582 Kill Process 60.8% Medium 2.329004207705794 https://leetcode.com/problems/kill-process
10 1 Two Sum 45.6% Easy 2.2663379529079926 https://leetcode.com/problems/two-sum
11 451 Sort Characters By Frequency 63.0% Medium 2.214754567267123 https://leetcode.com/problems/sort-characters-by-frequency
12 2 Add Two Numbers 33.9% Medium 2.2105161651535843 https://leetcode.com/problems/add-two-numbers
13 1169 Invalid Transactions 31.2% Medium 2.1276788037634873 https://leetcode.com/problems/invalid-transactions
14 117 Populating Next Right Pointers in Each Node II 39.1% Medium 2.118212486885331 https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
15 42 Trapping Rain Water 48.9% Hard 2.0660776889450734 https://leetcode.com/problems/trapping-rain-water
16 20 Valid Parentheses 39.0% Easy 2.0208637675689056 https://leetcode.com/problems/valid-parentheses
17 380 Insert Delete GetRandom O(1) 47.5% Medium 1.9093758419504783 https://leetcode.com/problems/insert-delete-getrandom-o1
18 155 Min Stack 44.5% Easy 1.8753356079546997 https://leetcode.com/problems/min-stack
19 98 Validate Binary Search Tree 27.8% Medium 1.8280334735241495 https://leetcode.com/problems/validate-binary-search-tree
20 253 Meeting Rooms II 45.7% Medium 1.7748254445172882 https://leetcode.com/problems/meeting-rooms-ii
21 121 Best Time to Buy and Sell Stock 50.5% Easy 1.7316498584399342 https://leetcode.com/problems/best-time-to-buy-and-sell-stock
22 387 First Unique Character in a String 53.4% Easy 1.6717206372907538 https://leetcode.com/problems/first-unique-character-in-a-string
23 56 Merge Intervals 39.3% Medium 1.6344853036753995 https://leetcode.com/problems/merge-intervals
24 214 Shortest Palindrome 29.8% Hard 1.628304607593452 https://leetcode.com/problems/shortest-palindrome
25 1274 Number of Ships in a Rectangle 66.3% Hard 1.6253239794553143 https://leetcode.com/problems/number-of-ships-in-a-rectangle
26 1029 Two City Scheduling 56.1% Easy 1.6062408497394156 https://leetcode.com/problems/two-city-scheduling
27 283 Move Zeroes 57.8% Easy 1.5700380214242422 https://leetcode.com/problems/move-zeroes
28 116 Populating Next Right Pointers in Each Node 45.2% Medium 1.5282163044390433 https://leetcode.com/problems/populating-next-right-pointers-in-each-node
29 390 Elimination Game 44.5% Medium 1.435519307483543 https://leetcode.com/problems/elimination-game
30 3 Longest Substring Without Repeating Characters 30.4% Medium 1.3959826812294072 https://leetcode.com/problems/longest-substring-without-repeating-characters
31 23 Merge k Sorted Lists 40.2% Hard 1.390362038117481 https://leetcode.com/problems/merge-k-sorted-lists
32 1209 Remove All Adjacent Duplicates in String II 56.9% Medium 1.2788741124990537 https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii
33 463 Island Perimeter 65.7% Easy 1.245274068255333 https://leetcode.com/problems/island-perimeter
34 242 Valid Anagram 56.9% Easy 1.1337861426369056 https://leetcode.com/problems/valid-anagram
35 269 Alien Dictionary 33.3% Hard 1.099252698552309 https://leetcode.com/problems/alien-dictionary
36 114 Flatten Binary Tree to Linked List 49.3% Medium 1.0986122886681096 https://leetcode.com/problems/flatten-binary-tree-to-linked-list
37 139 Word Break 40.1% Medium 1.0903842081598691 https://leetcode.com/problems/word-break
38 4 Median of Two Sorted Arrays 29.6% Hard 1.0617282987657621 https://leetcode.com/problems/median-of-two-sorted-arrays
39 271 Encode and Decode Strings 31.5% Medium 1.0528027526368156 https://leetcode.com/problems/encode-and-decode-strings
40 33 Search in Rotated Sorted Array 34.5% Medium 1.0520357838367607 https://leetcode.com/problems/search-in-rotated-sorted-array
41 12 Integer to Roman 55.1% Medium 1.0302007147147747 https://leetcode.com/problems/integer-to-roman
42 206 Reverse Linked List 62.5% Easy 1.0194232916385328 https://leetcode.com/problems/reverse-linked-list
43 301 Remove Invalid Parentheses 43.3% Hard 1.0163915378390016 https://leetcode.com/problems/remove-invalid-parentheses
44 21 Merge Two Sorted Lists 53.5% Easy 0.9730025194287449 https://leetcode.com/problems/merge-two-sorted-lists
45 7 Reverse Integer 25.8% Easy 0.9636538129651142 https://leetcode.com/problems/reverse-integer
46 69 Sqrt(x) 33.9% Easy 0.9425416082510271 https://leetcode.com/problems/sqrtx
47 628 Maximum Product of Three Numbers 47.1% Easy 0.9179560111932162 https://leetcode.com/problems/maximum-product-of-three-numbers
48 15 3Sum 26.8% Medium 0.9115464188984339 https://leetcode.com/problems/3sum
49 346 Moving Average from Data Stream 70.9% Easy 0.893574774039618 https://leetcode.com/problems/moving-average-from-data-stream
50 105 Construct Binary Tree from Preorder and Inorder Traversal 48.8% Medium 0.856966942738701 https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
51 554 Brick Wall 50.0% Medium 0.8487112881843506 https://leetcode.com/problems/brick-wall
52 460 LFU Cache 34.2% Hard 0.8452742509276767 https://leetcode.com/problems/lfu-cache
53 53 Maximum Subarray 46.5% Easy 0.8338660450189812 https://leetcode.com/problems/maximum-subarray
54 692 Top K Frequent Words 51.8% Medium 0.8219759071619612 https://leetcode.com/problems/top-k-frequent-words
55 5 Longest Palindromic Substring 29.5% Medium 0.8154521489335768 https://leetcode.com/problems/longest-palindromic-substring
56 239 Sliding Window Maximum 43.0% Hard 0.8060721931479718 https://leetcode.com/problems/sliding-window-maximum
57 295 Find Median from Data Stream 44.3% Hard 0.7864008043695105 https://leetcode.com/problems/find-median-from-data-stream
58 62 Unique Paths 54.1% Medium 0.7819517612115802 https://leetcode.com/problems/unique-paths
59 236 Lowest Common Ancestor of a Binary Tree 45.7% Medium 0.7585897524597297 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
60 54 Spiral Matrix 34.1% Medium 0.7505169147393441 https://leetcode.com/problems/spiral-matrix
61 273 Integer to English Words 27.1% Hard 0.7404748586772619 https://leetcode.com/problems/integer-to-english-words
62 611 Valid Triangle Number 48.4% Medium 0.7357067949787413 https://leetcode.com/problems/valid-triangle-number
63 160 Intersection of Two Linked Lists 40.6% Easy 0.7095335003665627 https://leetcode.com/problems/intersection-of-two-linked-lists
64 332 Reconstruct Itinerary 36.7% Medium 0.6934933810134637 https://leetcode.com/problems/reconstruct-itinerary
65 987 Vertical Order Traversal of a Binary Tree 36.6% Medium 0.6653429641530142 https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree
66 173 Binary Search Tree Iterator 56.6% Medium 0.6626352388032212 https://leetcode.com/problems/binary-search-tree-iterator
67 10 Regular Expression Matching 26.8% Hard 0.6273817982285409 https://leetcode.com/problems/regular-expression-matching
68 122 Best Time to Buy and Sell Stock II 57.0% Easy 0.620692101344523 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
69 49 Group Anagrams 56.9% Medium 0.6192590691619644 https://leetcode.com/problems/group-anagrams
70 797 All Paths From Source to Target 77.9% Medium 0.6133054173259477 https://leetcode.com/problems/all-paths-from-source-to-target
71 102 Binary Tree Level Order Traversal 54.6% Medium 0.598984719563006 https://leetcode.com/problems/binary-tree-level-order-traversal
72 127 Word Ladder 29.6% Medium 0.5839478885949534 https://leetcode.com/problems/word-ladder
73 443 String Compression 41.3% Easy 0.5809942743419542 https://leetcode.com/problems/string-compression
74 88 Merge Sorted Array 39.4% Easy 0.571985667665598 https://leetcode.com/problems/merge-sorted-array
75 314 Binary Tree Vertical Order Traversal 45.3% Medium 0.5697543914580919 https://leetcode.com/problems/binary-tree-vertical-order-traversal
76 384 Shuffle an Array 52.8% Medium 0.5613156759328372 https://leetcode.com/problems/shuffle-an-array
77 235 Lowest Common Ancestor of a Binary Search Tree 49.9% Easy 0.5565464902832835 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree
78 322 Coin Change 35.5% Medium 0.5515361644679891 https://leetcode.com/problems/coin-change
79 78 Subsets 62.0% Medium 0.5447142447216986 https://leetcode.com/problems/subsets
80 1472 Design Browser History 64.6% Medium 0.5365781198684054 https://leetcode.com/problems/design-browser-history
81 399 Evaluate Division 51.6% Medium 0.5332723866487983 https://leetcode.com/problems/evaluate-division
82 140 Word Break II 32.6% Hard 0.5270660323324061 https://leetcode.com/problems/word-break-ii
83 72 Edit Distance 44.8% Hard 0.4973447790261514 https://leetcode.com/problems/edit-distance
84 199 Binary Tree Right Side View 54.1% Medium 0.48753322716717645 https://leetcode.com/problems/binary-tree-right-side-view
85 662 Maximum Width of Binary Tree 41.0% Medium 0.4763908360365309 https://leetcode.com/problems/maximum-width-of-binary-tree
86 759 Employee Free Time 66.3% Hard 0.4763656648250958 https://leetcode.com/problems/employee-free-time
87 84 Largest Rectangle in Histogram 35.2% Hard 0.47303377627978027 https://leetcode.com/problems/largest-rectangle-in-histogram
88 8 String to Integer (atoi) 15.4% Medium 0.4660655155190756 https://leetcode.com/problems/string-to-integer-atoi
89 128 Longest Consecutive Sequence 45.1% Hard 0.4586585434961303 https://leetcode.com/problems/longest-consecutive-sequence
90 41 First Missing Positive 32.0% Hard 0.4577280774627401 https://leetcode.com/problems/first-missing-positive
91 162 Find Peak Element 43.3% Medium 0.4542122961558814 https://leetcode.com/problems/find-peak-element
92 739 Daily Temperatures 63.3% Medium 0.4492773337550074 https://leetcode.com/problems/daily-temperatures
93 328 Odd Even Linked List 55.7% Medium 0.44107885769261934 https://leetcode.com/problems/odd-even-linked-list
94 126 Word Ladder II 22.1% Hard 0.43777160210436394 https://leetcode.com/problems/word-ladder-ii
95 50 Pow(x n) 30.3% Medium 0.4274653596092084 https://leetcode.com/problems/powx-n
96 535 Encode and Decode TinyURL 79.9% Medium 0.4221173972425086 https://leetcode.com/problems/encode-and-decode-tinyurl
97 347 Top K Frequent Elements 61.2% Medium 0.4113452979974663 https://leetcode.com/problems/top-k-frequent-elements
98 234 Palindrome Linked List 39.3% Easy 0.40610862095331074 https://leetcode.com/problems/palindrome-linked-list
99 488 Zuma Game 39.9% Hard 0.3999856423435388 https://leetcode.com/problems/zuma-game
100 118 Pascal's Triangle 52.5% Easy 0.3983282893707838 https://leetcode.com/problems/pascals-triangle
101 31 Next Permutation 32.6% Medium 0.3965135773768611 https://leetcode.com/problems/next-permutation
102 11 Container With Most Water 50.8% Medium 0.3920877580285051 https://leetcode.com/problems/container-with-most-water
103 496 Next Greater Element I 63.8% Easy 0.39096401741736453 https://leetcode.com/problems/next-greater-element-i
104 171 Excel Sheet Column Number 55.9% Easy 0.3891015365515057 https://leetcode.com/problems/excel-sheet-column-number
105 9 Palindrome Number 48.4% Easy 0.3889248192216875 https://leetcode.com/problems/palindrome-number
106 1047 Remove All Adjacent Duplicates In String 68.6% Easy 0.38744859425846845 https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string
107 34 Find First and Last Position of Element in Sorted Array 36.2% Medium 0.3847852205330874 https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array
108 349 Intersection of Two Arrays 62.5% Easy 0.3823387899165356 https://leetcode.com/problems/intersection-of-two-arrays
109 311 Sparse Matrix Multiplication 61.9% Medium 0.37117603462953225 https://leetcode.com/problems/sparse-matrix-multiplication
110 79 Word Search 35.6% Medium 0.355241060704579 https://leetcode.com/problems/word-search
111 44 Wildcard Matching 24.7% Hard 0.34881383996175425 https://leetcode.com/problems/wildcard-matching
112 362 Design Hit Counter 63.7% Medium 0.34451909789108437 https://leetcode.com/problems/design-hit-counter
113 230 Kth Smallest Element in a BST 60.2% Medium 0.3413184800841155 https://leetcode.com/problems/kth-smallest-element-in-a-bst
114 124 Binary Tree Maximum Path Sum 34.3% Hard 0.33702679091242466 https://leetcode.com/problems/binary-tree-maximum-path-sum
115 268 Missing Number 51.7% Easy 0.3338128467131867 https://leetcode.com/problems/missing-number
116 64 Minimum Path Sum 54.5% Medium 0.3317195432884912 https://leetcode.com/problems/minimum-path-sum
117 215 Kth Largest Element in an Array 55.4% Medium 0.3300278321382259 https://leetcode.com/problems/kth-largest-element-in-an-array
118 353 Design Snake Game 34.2% Medium 0.32931497055013925 https://leetcode.com/problems/design-snake-game
119 46 Permutations 63.5% Medium 0.32304289477761106 https://leetcode.com/problems/permutations
120 221 Maximal Square 37.7% Medium 0.3057737602882765 https://leetcode.com/problems/maximal-square
121 17 Letter Combinations of a Phone Number 46.8% Medium 0.30552675752628056 https://leetcode.com/problems/letter-combinations-of-a-phone-number
122 205 Isomorphic Strings 39.8% Easy 0.30101800626340847 https://leetcode.com/problems/isomorphic-strings
123 75 Sort Colors 47.3% Medium 0.2778743740687611 https://leetcode.com/problems/sort-colors
124 695 Max Area of Island 62.7% Medium 0.2770125235595406 https://leetcode.com/problems/max-area-of-island
125 136 Single Number 65.5% Easy 0.27522969174444734 https://leetcode.com/problems/single-number
126 22 Generate Parentheses 62.7% Medium 0.274428104404814 https://leetcode.com/problems/generate-parentheses
127 229 Majority Element II 35.6% Medium 0.2683771567744578 https://leetcode.com/problems/majority-element-ii
128 503 Next Greater Element II 56.5% Medium 0.26590939545778536 https://leetcode.com/problems/next-greater-element-ii
129 209 Minimum Size Subarray Sum 38.2% Medium 0.26557641498817536 https://leetcode.com/problems/minimum-size-subarray-sum
130 694 Number of Distinct Islands 56.0% Medium 0.26236426446749106 https://leetcode.com/problems/number-of-distinct-islands
131 422 Valid Word Square 37.7% Easy 0.2578291093020998 https://leetcode.com/problems/valid-word-square
132 252 Meeting Rooms 54.6% Easy 0.2539330877151399 https://leetcode.com/problems/meeting-rooms
133 286 Walls and Gates 54.5% Medium 0.2531417471996048 https://leetcode.com/problems/walls-and-gates
134 48 Rotate Image 56.7% Medium 0.2525907526405108 https://leetcode.com/problems/rotate-image
135 821 Shortest Distance to a Character 66.9% Easy 0.24320527953164725 https://leetcode.com/problems/shortest-distance-to-a-character
136 240 Search a 2D Matrix II 43.2% Medium 0.24218097481422138 https://leetcode.com/problems/search-a-2d-matrix-ii
137 716 Max Stack 42.6% Easy 0.24108416003009112 https://leetcode.com/problems/max-stack
138 85 Maximal Rectangle 37.7% Hard 0.2404427185770219 https://leetcode.com/problems/maximal-rectangle
139 63 Unique Paths II 34.6% Medium 0.2348446787507317 https://leetcode.com/problems/unique-paths-ii
140 76 Minimum Window Substring 34.6% Hard 0.23436338587849237 https://leetcode.com/problems/minimum-window-substring
141 572 Subtree of Another Tree 44.1% Easy 0.23328636844031944 https://leetcode.com/problems/subtree-of-another-tree
142 151 Reverse Words in a String 21.9% Medium 0.23114347137583938 https://leetcode.com/problems/reverse-words-in-a-string
143 412 Fizz Buzz 62.3% Easy 0.23023806672070082 https://leetcode.com/problems/fizz-buzz
144 652 Find Duplicate Subtrees 50.2% Medium 0.23015822831359434 https://leetcode.com/problems/find-duplicate-subtrees
145 924 Minimize Malware Spread 42.0% Hard 0.22884157242884745 https://leetcode.com/problems/minimize-malware-spread
146 91 Decode Ways 24.7% Medium 0.2254754606491885 https://leetcode.com/problems/decode-ways
147 238 Product of Array Except Self 60.1% Medium 0.22477655808124566 https://leetcode.com/problems/product-of-array-except-self
148 1223 Dice Roll Simulation 45.6% Medium 0.2166710368085923 https://leetcode.com/problems/dice-roll-simulation
149 560 Subarray Sum Equals K 43.9% Medium 0.21610695147886494 https://leetcode.com/problems/subarray-sum-equals-k
150 442 Find All Duplicates in an Array 67.8% Medium 0.21334822899856468 https://leetcode.com/problems/find-all-duplicates-in-an-array
151 6 ZigZag Conversion 36.3% Medium 0.21040551802808702 https://leetcode.com/problems/zigzag-conversion
152 287 Find the Duplicate Number 55.5% Medium 0.20950804936372536 https://leetcode.com/problems/find-the-duplicate-number
153 315 Count of Smaller Numbers After Self 41.5% Hard 0.20806843787404064 https://leetcode.com/problems/count-of-smaller-numbers-after-self
154 232 Implement Queue using Stacks 49.6% Easy 0.20615437352136948 https://leetcode.com/problems/implement-queue-using-stacks
155 208 Implement Trie (Prefix Tree) 49.4% Medium 0.20593713931590088 https://leetcode.com/problems/implement-trie-prefix-tree
156 16 3Sum Closest 46.0% Medium 0.2058081329110988 https://leetcode.com/problems/3sum-closest
157 513 Find Bottom Left Tree Value 61.5% Medium 0.20328581918106378 https://leetcode.com/problems/find-bottom-left-tree-value
158 543 Diameter of Binary Tree 48.4% Easy 0.2027481163433401 https://leetcode.com/problems/diameter-of-binary-tree
159 836 Rectangle Overlap 48.6% Easy 0.19944370144318244 https://leetcode.com/problems/rectangle-overlap
160 13 Roman to Integer 55.7% Easy 0.19870163716069 https://leetcode.com/problems/roman-to-integer
161 510 Inorder Successor in BST II 58.0% Medium 0.19714257713870645 https://leetcode.com/problems/inorder-successor-in-bst-ii
162 329 Longest Increasing Path in a Matrix 43.4% Hard 0.1954447382872236 https://leetcode.com/problems/longest-increasing-path-in-a-matrix
163 1060 Missing Element in Sorted Array 54.5% Medium 0.1950605825713844 https://leetcode.com/problems/missing-element-in-sorted-array
164 94 Binary Tree Inorder Traversal 63.3% Medium 0.1948180665300998 https://leetcode.com/problems/binary-tree-inorder-traversal
165 120 Triangle 44.2% Medium 0.19325424809414601 https://leetcode.com/problems/triangle
166 92 Reverse Linked List II 38.8% Medium 0.19248981022320735 https://leetcode.com/problems/reverse-linked-list-ii
167 153 Find Minimum in Rotated Sorted Array 45.1% Medium 0.191995528322351 https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
168 207 Course Schedule 43.1% Medium 0.19082802919680183 https://leetcode.com/problems/course-schedule
169 402 Remove K Digits 28.4% Medium 0.18924199963852842 https://leetcode.com/problems/remove-k-digits
170 658 Find K Closest Elements 40.9% Medium 0.18663941293482042 https://leetcode.com/problems/find-k-closest-elements
171 518 Coin Change 2 50.2% Medium 0.18373876827436816 https://leetcode.com/problems/coin-change-2
172 889 Construct Binary Tree from Preorder and Postorder Traversal 66.2% Medium 0.18315872720701828 https://leetcode.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal
173 70 Climbing Stairs 47.8% Easy 0.1820258821345787 https://leetcode.com/problems/climbing-stairs
174 226 Invert Binary Tree 65.0% Easy 0.18135450553395235 https://leetcode.com/problems/invert-binary-tree
175 19 Remove Nth Node From End of List 35.2% Medium 0.17998225417577363 https://leetcode.com/problems/remove-nth-node-from-end-of-list
176 203 Remove Linked List Elements 38.6% Easy 0.17950766176348673 https://leetcode.com/problems/remove-linked-list-elements
177 1244 Design A Leaderboard 60.7% Medium 0.17763094743610072 https://leetcode.com/problems/design-a-leaderboard
178 202 Happy Number 50.4% Easy 0.17408932588103054 https://leetcode.com/problems/happy-number
179 1249 Minimum Remove to Make Valid Parentheses 62.5% Medium 0.17148553745267525 https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses
180 97 Interleaving String 31.5% Hard 0.17070662167607636 https://leetcode.com/problems/interleaving-string
181 344 Reverse String 68.5% Easy 0.16907996884887766 https://leetcode.com/problems/reverse-string
182 971 Flip Binary Tree To Match Preorder Traversal 45.7% Medium 0.1670540846631662 https://leetcode.com/problems/flip-binary-tree-to-match-preorder-traversal
183 529 Minesweeper 59.1% Medium 0.16635770580494058 https://leetcode.com/problems/minesweeper
184 727 Minimum Window Subsequence 41.8% Hard 0.15970111035790735 https://leetcode.com/problems/minimum-window-subsequence
185 101 Symmetric Tree 46.8% Easy 0.15457702816029933 https://leetcode.com/problems/symmetric-tree
186 414 Third Maximum Number 30.5% Easy 0.15407631103237035 https://leetcode.com/problems/third-maximum-number
187 417 Pacific Atlantic Water Flow 41.1% Medium 0.15226921172755276 https://leetcode.com/problems/pacific-atlantic-water-flow
188 470 Implement Rand10() Using Rand7() 46.3% Medium 0.15154989812720093 https://leetcode.com/problems/implement-rand10-using-rand7
189 386 Lexicographical Numbers 51.6% Medium 0.14854271203296188 https://leetcode.com/problems/lexicographical-numbers
190 504 Base 7 46.2% Easy 0.14612656455721032 https://leetcode.com/problems/base-7
191 24 Swap Nodes in Pairs 50.4% Medium 0.14499222491243005 https://leetcode.com/problems/swap-nodes-in-pairs
192 237 Delete Node in a Linked List 63.8% Easy 0.14499031042859406 https://leetcode.com/problems/delete-node-in-a-linked-list
193 852 Peak Index in a Mountain Array 71.6% Easy 0.1445812288111076 https://leetcode.com/problems/peak-index-in-a-mountain-array
194 415 Add Strings 47.5% Easy 0.14343082219506165 https://leetcode.com/problems/add-strings
195 426 Convert Binary Search Tree to Sorted Doubly Linked List 59.1% Medium 0.14252878462127264 https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list
196 348 Design Tic-Tac-Toe 54.3% Medium 0.14252878462127264 https://leetcode.com/problems/design-tic-tac-toe
197 188 Best Time to Buy and Sell Stock IV 28.0% Hard 0.1396533313293086 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv
198 225 Implement Stack using Queues 45.1% Easy 0.1390589799907463 https://leetcode.com/problems/implement-stack-using-queues
199 250 Count Univalue Subtrees 52.0% Medium 0.13767409129953323 https://leetcode.com/problems/count-univalue-subtrees
200 71 Simplify Path 32.6% Medium 0.13762137787604775 https://leetcode.com/problems/simplify-path
201 565 Array Nesting 55.5% Medium 0.13762137787604775 https://leetcode.com/problems/array-nesting
202 397 Integer Replacement 32.9% Medium 0.13720112151348504 https://leetcode.com/problems/integer-replacement
203 99 Recover Binary Search Tree 39.7% Hard 0.1363765523041528 https://leetcode.com/problems/recover-binary-search-tree
204 81 Search in Rotated Sorted Array II 33.0% Medium 0.13455967035008862 https://leetcode.com/problems/search-in-rotated-sorted-array-ii
205 678 Valid Parenthesis String 31.0% Medium 0.13417736429600724 https://leetcode.com/problems/valid-parenthesis-string
206 125 Valid Palindrome 36.7% Easy 0.13416684727631417 https://leetcode.com/problems/valid-palindrome
207 378 Kth Smallest Element in a Sorted Matrix 54.3% Medium 0.13397014948713715 https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix
208 1347 Minimum Number of Steps to Make Two Strings Anagram 74.7% Medium 0.13375498122243565 https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram
209 123 Best Time to Buy and Sell Stock III 37.5% Hard 0.12991500860874672 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii
210 359 Logger Rate Limiter 70.8% Easy 0.1248502028794759 https://leetcode.com/problems/logger-rate-limiter
211 109 Convert Sorted List to Binary Search Tree 47.7% Medium 0.12302181451266285 https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree
212 228 Summary Ranges 39.5% Medium 0.1207191114343526 https://leetcode.com/problems/summary-ranges
213 404 Sum of Left Leaves 50.9% Easy 0.1193071581156751 https://leetcode.com/problems/sum-of-left-leaves
214 341 Flatten Nested List Iterator 52.9% Medium 0.11879160861126825 https://leetcode.com/problems/flatten-nested-list-iterator
215 1054 Distant Barcodes 43.2% Medium 0.11855973472455572 https://leetcode.com/problems/distant-barcodes
216 103 Binary Tree Zigzag Level Order Traversal 48.3% Medium 0.11648551004070631 https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
217 435 Non-overlapping Intervals 42.9% Medium 0.1158164666843426 https://leetcode.com/problems/non-overlapping-intervals
218 61 Rotate List 30.0% Medium 0.11528615545779625 https://leetcode.com/problems/rotate-list
219 28 Implement strStr() 34.5% Easy 0.11289821506454988 https://leetcode.com/problems/implement-strstr
220 721 Accounts Merge 48.8% Medium 0.11257939199174459 https://leetcode.com/problems/accounts-merge
221 708 Insert into a Sorted Circular Linked List 31.6% Medium 0.11219725014953141 https://leetcode.com/problems/insert-into-a-sorted-circular-linked-list
222 532 K-diff Pairs in an Array 31.6% Easy 0.111723209445655 https://leetcode.com/problems/k-diff-pairs-in-an-array
223 82 Remove Duplicates from Sorted List II 36.8% Medium 0.1110882064011508 https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii
224 1188 Design Bounded Blocking Queue 70.5% Medium 0.11030454201470608 https://leetcode.com/problems/design-bounded-blocking-queue
225 198 House Robber 42.0% Easy 0.10785152815546674 https://leetcode.com/problems/house-robber
226 108 Convert Sorted Array to Binary Search Tree 57.9% Easy 0.10686314554236129 https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree
227 112 Path Sum 41.2% Easy 0.10531937947649221 https://leetcode.com/problems/path-sum
228 26 Remove Duplicates from Sorted Array 45.1% Easy 0.10424167132184688 https://leetcode.com/problems/remove-duplicates-from-sorted-array
229 289 Game of Life 54.5% Medium 0.10365526175211173 https://leetcode.com/problems/game-of-life
230 336 Palindrome Pairs 33.7% Hard 0.10259559233600947 https://leetcode.com/problems/palindrome-pairs
231 141 Linked List Cycle 41.1% Easy 0.10063328674952829 https://leetcode.com/problems/linked-list-cycle
232 90 Subsets II 47.1% Medium 0.09830555874512009 https://leetcode.com/problems/subsets-ii
233 642 Design Search Autocomplete System 44.7% Hard 0.09500811062818718 https://leetcode.com/problems/design-search-autocomplete-system
234 567 Permutation in String 44.4% Medium 0.08995633353390375 https://leetcode.com/problems/permutation-in-string
235 285 Inorder Successor in BST 40.4% Medium 0.08649364464568089 https://leetcode.com/problems/inorder-successor-in-bst
236 991 Broken Calculator 45.6% Medium 0.08515780834030685 https://leetcode.com/problems/broken-calculator
237 131 Palindrome Partitioning 47.5% Medium 0.08388550716227433 https://leetcode.com/problems/palindrome-partitioning
238 297 Serialize and Deserialize Binary Tree 47.5% Hard 0.0834242216674795 https://leetcode.com/problems/serialize-and-deserialize-binary-tree
239 204 Count Primes 31.5% Easy 0.08336741437414971 https://leetcode.com/problems/count-primes
240 857 Minimum Cost to Hire K Workers 49.6% Hard 0.08320805808821628 https://leetcode.com/problems/minimum-cost-to-hire-k-workers
241 557 Reverse Words in a String III 69.8% Easy 0.0828837318214325 https://leetcode.com/problems/reverse-words-in-a-string-iii
242 813 Largest Sum of Averages 49.9% Medium 0.08201315166083516 https://leetcode.com/problems/largest-sum-of-averages
243 737 Sentence Similarity II 45.8% Medium 0.08167803101426718 https://leetcode.com/problems/sentence-similarity-ii
244 74 Search a 2D Matrix 36.5% Medium 0.08108897817576358 https://leetcode.com/problems/search-a-2d-matrix
245 448 Find All Numbers Disappeared in an Array 55.9% Easy 0.08099584515633794 https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array
246 96 Unique Binary Search Trees 52.9% Medium 0.08025695513016742 https://leetcode.com/problems/unique-binary-search-trees
247 673 Number of Longest Increasing Subsequence 35.7% Medium 0.08025695513016742 https://leetcode.com/problems/number-of-longest-increasing-subsequence
248 303 Range Sum Query - Immutable 44.7% Easy 0.08001707486353822 https://leetcode.com/problems/range-sum-query-immutable
249 392 Is Subsequence 49.2% Easy 0.07897107508821988 https://leetcode.com/problems/is-subsequence
250 784 Letter Case Permutation 64.6% Medium 0.0787033338274549 https://leetcode.com/problems/letter-case-permutation
251 189 Rotate Array 34.7% Easy 0.07859731751631634 https://leetcode.com/problems/rotate-array
252 1297 Maximum Number of Occurrences of a Substring 47.3% Medium 0.07770898432731625 https://leetcode.com/problems/maximum-number-of-occurrences-of-a-substring
253 55 Jump Game 34.6% Medium 0.07748307858552587 https://leetcode.com/problems/jump-game
254 1155 Number of Dice Rolls With Target Sum 49.0% Medium 0.07356256717701673 https://leetcode.com/problems/number-of-dice-rolls-with-target-sum
255 450 Delete Node in a BST 43.1% Medium 0.07216836682371046 https://leetcode.com/problems/delete-node-in-a-bst
256 35 Search Insert Position 42.6% Easy 0.07187646029497265 https://leetcode.com/problems/search-insert-position
257 1114 Print in Order 65.7% Easy 0.0700675626167169 https://leetcode.com/problems/print-in-order
258 432 All O`one Data Structure 32.4% Hard 0.06887402901251127 https://leetcode.com/problems/all-oone-data-structure
259 338 Counting Bits 69.5% Medium 0.06616169008990747 https://leetcode.com/problems/counting-bits
260 1145 Binary Tree Coloring Game 51.2% Medium 0.06592172080482424 https://leetcode.com/problems/binary-tree-coloring-game
261 167 Two Sum II - Input array is sorted 54.1% Easy 0.06546140041370939 https://leetcode.com/problems/two-sum-ii-input-array-is-sorted
262 14 Longest Common Prefix 35.4% Easy 0.06517750377430989 https://leetcode.com/problems/longest-common-prefix
263 846 Hand of Straights 54.2% Medium 0.06472423940349638 https://leetcode.com/problems/hand-of-straights
264 1105 Filling Bookcase Shelves 58.1% Medium 0.06464285626208545 https://leetcode.com/problems/filling-bookcase-shelves
265 36 Valid Sudoku 48.7% Medium 0.06350219850936348 https://leetcode.com/problems/valid-sudoku
266 413 Arithmetic Slices 57.9% Medium 0.06286986221654821 https://leetcode.com/problems/arithmetic-slices
267 350 Intersection of Two Arrays II 51.4% Easy 0.06202949919751832 https://leetcode.com/problems/intersection-of-two-arrays-ii
268 47 Permutations II 46.4% Medium 0.05897935516253239 https://leetcode.com/problems/permutations-ii
269 516 Longest Palindromic Subsequence 53.2% Medium 0.058432099871092734 https://leetcode.com/problems/longest-palindromic-subsequence
270 32 Longest Valid Parentheses 28.4% Hard 0.0556316959861487 https://leetcode.com/problems/longest-valid-parentheses
271 30 Substring with Concatenation of All Words 25.4% Hard 0.05509349054082484 https://leetcode.com/problems/substring-with-concatenation-of-all-words
272 149 Max Points on a Line 16.9% Hard 0.0550597771830274 https://leetcode.com/problems/max-points-on-a-line
273 222 Count Complete Tree Nodes 46.8% Medium 0.05492114472894792 https://leetcode.com/problems/count-complete-tree-nodes
274 752 Open the Lock 51.8% Medium 0.05449289949671372 https://leetcode.com/problems/open-the-lock
275 703 Kth Largest Element in a Stream 49.7% Easy 0.054472280837981495 https://leetcode.com/problems/kth-largest-element-in-a-stream
276 724 Find Pivot Index 44.0% Easy 0.05428741283782842 https://leetcode.com/problems/find-pivot-index
277 714 Best Time to Buy and Sell Stock with Transaction Fee 54.7% Medium 0.05377639678080413 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee
278 395 Longest Substring with At Least K Repeating Characters 41.4% Medium 0.05371219359052555 https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters
279 1312 Minimum Insertion Steps to Make a String Palindrome 58.1% Hard 0.050261834780888255 https://leetcode.com/problems/minimum-insertion-steps-to-make-a-string-palindrome
280 216 Combination Sum III 56.6% Medium 0.05017774958571902 https://leetcode.com/problems/combination-sum-iii
281 219 Contains Duplicate II 37.7% Easy 0.05012010405957234 https://leetcode.com/problems/contains-duplicate-ii
282 129 Sum Root to Leaf Numbers 49.1% Medium 0.050010420574661374 https://leetcode.com/problems/sum-root-to-leaf-numbers
283 152 Maximum Product Subarray 31.7% Medium 0.04922388062576129 https://leetcode.com/problems/maximum-product-subarray
284 437 Path Sum III 47.2% Medium 0.047656426639019575 https://leetcode.com/problems/path-sum-iii
285 986 Interval List Intersections 67.3% Medium 0.04703983015489417 https://leetcode.com/problems/interval-list-intersections
286 556 Next Greater Element III 31.7% Medium 0.04679216150675895 https://leetcode.com/problems/next-greater-element-iii
287 933 Number of Recent Calls 71.9% Easy 0.046737477851689815 https://leetcode.com/problems/number-of-recent-calls
288 978 Longest Turbulent Subarray 46.6% Medium 0.046737477851689815 https://leetcode.com/problems/longest-turbulent-subarray
289 176 Second Highest Salary 31.6% Easy 0.045338680589061736 https://leetcode.com/problems/second-highest-salary
290 733 Flood Fill 55.3% Easy 0.04413292021115189 https://leetcode.com/problems/flood-fill
291 104 Maximum Depth of Binary Tree 66.0% Easy 0.043698924213377836 https://leetcode.com/problems/maximum-depth-of-binary-tree
292 895 Maximum Frequency Stack 60.6% Hard 0.04329680575332419 https://leetcode.com/problems/maximum-frequency-stack
293 110 Balanced Binary Tree 43.5% Easy 0.04313244044957316 https://leetcode.com/problems/balanced-binary-tree
294 540 Single Element in a Sorted Array 57.9% Medium 0.042721256704769804 https://leetcode.com/problems/single-element-in-a-sorted-array
295 787 Cheapest Flights Within K Stops 39.3% Medium 0.04186657939278993 https://leetcode.com/problems/cheapest-flights-within-k-stops
296 29 Divide Two Integers 16.4% Medium 0.04159641425367403 https://leetcode.com/problems/divide-two-integers
297 258 Add Digits 57.6% Easy 0.04107874349984602 https://leetcode.com/problems/add-digits
298 292 Nim Game 54.9% Easy 0.03996979643236185 https://leetcode.com/problems/nim-game
299 212 Word Search II 34.9% Hard 0.03881156536434583 https://leetcode.com/problems/word-search-ii
300 18 4Sum 33.7% Medium 0.03880215185647971 https://leetcode.com/problems/4sum
301 993 Cousins in Binary Tree 52.0% Easy 0.03876454345024432 https://leetcode.com/problems/cousins-in-binary-tree
302 270 Closest Binary Search Tree Value 48.5% Easy 0.03812405784173832 https://leetcode.com/problems/closest-binary-search-tree-value
303 144 Binary Tree Preorder Traversal 55.7% Medium 0.03751377610149742 https://leetcode.com/problems/binary-tree-preorder-traversal
304 646 Maximum Length of Pair Chain 51.9% Medium 0.036870535808327706 https://leetcode.com/problems/maximum-length-of-pair-chain
305 340 Longest Substring with At Most K Distinct Characters 44.1% Hard 0.035917667750755534 https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters
306 650 2 Keys Keyboard 49.2% Medium 0.035910501305770864 https://leetcode.com/problems/2-keys-keyboard
307 334 Increasing Triplet Subsequence 40.0% Medium 0.03577488021091517 https://leetcode.com/problems/increasing-triplet-subsequence
308 595 Big Countries 77.3% Easy 0.03475253199083958 https://leetcode.com/problems/big-countries
309 1002 Find Common Characters 67.6% Easy 0.03404262162737441 https://leetcode.com/problems/find-common-characters
310 217 Contains Duplicate 56.0% Easy 0.03367321510658789 https://leetcode.com/problems/contains-duplicate
311 274 H-Index 36.1% Medium 0.03364488914272426 https://leetcode.com/problems/h-index
312 1123 Lowest Common Ancestor of Deepest Leaves 66.8% Medium 0.03147388037973136 https://leetcode.com/problems/lowest-common-ancestor-of-deepest-leaves
313 38 Count and Say 44.6% Easy 0.030956234663467107 https://leetcode.com/problems/count-and-say
314 581 Shortest Unsorted Continuous Subarray 31.1% Easy 0.029773949243192512 https://leetcode.com/problems/shortest-unsorted-continuous-subarray
315 66 Plus One 43.0% Easy 0.028982869090985654 https://leetcode.com/problems/plus-one
316 147 Insertion Sort List 41.1% Medium 0.028675799976666333 https://leetcode.com/problems/insertion-sort-list
317 621 Task Scheduler 50.1% Medium 0.028315771352780777 https://leetcode.com/problems/task-scheduler
318 547 Friend Circles 58.6% Medium 0.027307522052851193 https://leetcode.com/problems/friend-circles
319 310 Minimum Height Trees 32.3% Medium 0.02446605215440636 https://leetcode.com/problems/minimum-height-trees
320 210 Course Schedule II 40.7% Medium 0.023133880315464483 https://leetcode.com/problems/course-schedule-ii
321 39 Combination Sum 56.1% Medium 0.02267028230338623 https://leetcode.com/problems/combination-sum
322 113 Path Sum II 46.7% Medium 0.021882711249507664 https://leetcode.com/problems/path-sum-ii
323 40 Combination Sum II 48.2% Medium 0.021424290044083395 https://leetcode.com/problems/combination-sum-ii
324 278 First Bad Version 35.7% Easy 0.021394050366625766 https://leetcode.com/problems/first-bad-version
325 224 Basic Calculator 36.8% Hard 0.020965128465044926 https://leetcode.com/problems/basic-calculator
326 424 Longest Repeating Character Replacement 47.0% Medium 0.020461071871340063 https://leetcode.com/problems/longest-repeating-character-replacement
327 617 Merge Two Binary Trees 74.1% Easy 0.018496211633622316 https://leetcode.com/problems/merge-two-binary-trees
328 438 Find All Anagrams in a String 43.3% Medium 0.01819334596120571 https://leetcode.com/problems/find-all-anagrams-in-a-string
329 406 Queue Reconstruction by Height 66.9% Medium 0.01774669468133533 https://leetcode.com/problems/queue-reconstruction-by-height
330 863 All Nodes Distance K in Binary Tree 55.4% Medium 0.01695674371877865 https://leetcode.com/problems/all-nodes-distance-k-in-binary-tree
331 1025 Divisor Game 66.3% Easy 0.015015297119995507 https://leetcode.com/problems/divisor-game
332 912 Sort an Array 63.9% Medium 0.01443026482902881 https://leetcode.com/problems/sort-an-array
333 27 Remove Element 48.2% Easy 0.01413451093490476 https://leetcode.com/problems/remove-element
334 100 Same Tree 53.4% Easy 0.012601237835529503 https://leetcode.com/problems/same-tree
335 172 Factorial Trailing Zeroes 37.8% Easy 0.012326812480658571 https://leetcode.com/problems/factorial-trailing-zeroes
336 957 Prison Cells After N Days 40.7% Medium 0.010986103354595014 https://leetcode.com/problems/prison-cells-after-n-days
337 559 Maximum Depth of N-ary Tree 68.7% Easy 0.010974047031976715 https://leetcode.com/problems/maximum-depth-of-n-ary-tree
338 746 Min Cost Climbing Stairs 50.3% Easy 0.009818439209289494 https://leetcode.com/problems/min-cost-climbing-stairs
339 106 Construct Binary Tree from Inorder and Postorder Traversal 47.2% Medium 0.009328969762346678 https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal
340 977 Squares of a Sorted Array 72.1% Easy 0.008733679968754604 https://leetcode.com/problems/squares-of-a-sorted-array
341 1480 Running Sum of 1d Array 90.5% Easy 0.0026196884456014947 https://leetcode.com/problems/running-sum-of-1d-array
342 266 Palindrome Permutation 61.9% Easy 0 https://leetcode.com/problems/palindrome-permutation
343 158 Read N Characters Given Read4 II - Call multiple times 33.8% Hard 0 https://leetcode.com/problems/read-n-characters-given-read4-ii-call-multiple-times
344 570 Managers with at Least 5 Direct Reports 66.0% Medium 0 https://leetcode.com/problems/managers-with-at-least-5-direct-reports
345 669 Trim a Binary Search Tree 63.0% Easy 0 https://leetcode.com/problems/trim-a-binary-search-tree
346 749 Contain Virus 44.6% Hard 0 https://leetcode.com/problems/contain-virus
347 1104 Path In Zigzag Labelled Binary Tree 72.0% Medium 0 https://leetcode.com/problems/path-in-zigzag-labelled-binary-tree
348 1478 Allocate Mailboxes 54.9% Hard 0 https://leetcode.com/problems/allocate-mailboxes