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1239,Maximum Length of a Concatenated String with Unique Characters,47.8%,Medium,0.6657761816190897, https://leetcode.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters
1246,Palindrome Removal,46.0%,Hard,0.5941286921253983, https://leetcode.com/problems/palindrome-removal
273,Integer to English Words,27.1%,Hard,0.5224812026317068, https://leetcode.com/problems/integer-to-english-words
428,Serialize and Deserialize N-ary Tree,59.4%,Hard,0.4508337131380154, https://leetcode.com/problems/serialize-and-deserialize-n-ary-tree
146,LRU Cache,33.2%,Medium,0.37918622364432397, https://leetcode.com/problems/lru-cache
1156,Swap For Longest Repeated Character Substring,49.0%,Medium,0.3764775712349121, https://leetcode.com/problems/swap-for-longest-repeated-character-substring
54,Spiral Matrix,34.1%,Medium,0.35306273805914157, https://leetcode.com/problems/spiral-matrix
212,Word Search II,34.9%,Hard,0.3492519632676119, https://leetcode.com/problems/word-search-ii
1236,Web Crawler,64.3%,Medium,0.33647223662121295, https://leetcode.com/problems/web-crawler
545,Boundary of Binary Tree,38.9%,Medium,0.32365154819215153, https://leetcode.com/problems/boundary-of-binary-tree
828,Count Unique Characters of All Substrings of a Given String,45.2%,Hard,0.2972515234679316, https://leetcode.com/problems/count-unique-characters-of-all-substrings-of-a-given-string
200,Number of Islands,46.8%,Medium,0.23204607197311616, https://leetcode.com/problems/number-of-islands
340,Longest Substring with At Most K Distinct Characters,44.1%,Hard,0.2311568687093931, https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters
25,Reverse Nodes in k-Group,42.1%,Hard,0.22841574636360815, https://leetcode.com/problems/reverse-nodes-in-k-group
218,The Skyline Problem,34.6%,Hard,0.20884831112738325, https://leetcode.com/problems/the-skyline-problem
348,Design Tic-Tac-Toe,54.3%,Medium,0.19933290262049122, https://leetcode.com/problems/design-tic-tac-toe
468,Validate IP Address,24.1%,Medium,0.19827548473619627, https://leetcode.com/problems/validate-ip-address
1375,Bulb Switcher III,62.6%,Medium,0.19622624370172712, https://leetcode.com/problems/bulb-switcher-iii
23,Merge k Sorted Lists,40.2%,Hard,0.18142464262604538, https://leetcode.com/problems/merge-k-sorted-lists
138,Copy List with Random Pointer,36.4%,Medium,0.17215255068496113, https://leetcode.com/problems/copy-list-with-random-pointer
179,Largest Number,28.8%,Medium,0.15788342025694224, https://leetcode.com/problems/largest-number
450,Delete Node in a BST,43.1%,Medium,0.15561959910053247, https://leetcode.com/problems/delete-node-in-a-bst
124,Binary Tree Maximum Path Sum,34.3%,Hard,0.15512094811323265, https://leetcode.com/problems/binary-tree-maximum-path-sum
767,Reorganize String,48.7%,Medium,0.15185314866152042, https://leetcode.com/problems/reorganize-string
1,Two Sum,45.6%,Easy,0.14920101860781756, https://leetcode.com/problems/two-sum
41,First Missing Positive,32.0%,Hard,0.14910731703527175, https://leetcode.com/problems/first-missing-positive
74,Search a 2D Matrix,36.5%,Medium,0.13990475142949543, https://leetcode.com/problems/search-a-2d-matrix
99,Recover Binary Search Tree,39.7%,Hard,0.1363765523041528, https://leetcode.com/problems/recover-binary-search-tree
42,Trapping Rain Water,48.9%,Hard,0.12389276378675394, https://leetcode.com/problems/trapping-rain-water
46,Permutations,63.5%,Medium,0.12027982804941116, https://leetcode.com/problems/permutations
93,Restore IP Addresses,35.6%,Medium,0.11756123239496619, https://leetcode.com/problems/restore-ip-addresses
116,Populating Next Right Pointers in Each Node,45.2%,Medium,0.1113806498369338, https://leetcode.com/problems/populating-next-right-pointers-in-each-node
1188,Design Bounded Blocking Queue,70.5%,Medium,0.11030454201470608, https://leetcode.com/problems/design-bounded-blocking-queue
37,Sudoku Solver,43.6%,Hard,0.1087554815281622, https://leetcode.com/problems/sudoku-solver
445,Add Two Numbers II,54.5%,Medium,0.10585667046830217, https://leetcode.com/problems/add-two-numbers-ii
773,Sliding Puzzle,59.3%,Hard,0.10294796925244239, https://leetcode.com/problems/sliding-puzzle
232,Implement Queue using Stacks,49.6%,Easy,0.09690200534777553, https://leetcode.com/problems/implement-queue-using-stacks
716,Max Stack,42.6%,Easy,0.09362342046209744, https://leetcode.com/problems/max-stack
4,Median of Two Sorted Arrays,29.6%,Hard,0.09321199094445486, https://leetcode.com/problems/median-of-two-sorted-arrays
510,Inorder Successor in BST II,58.0%,Medium,0.09244453252200126, https://leetcode.com/problems/inorder-successor-in-bst-ii
155,Min Stack,44.5%,Easy,0.09202674518071384, https://leetcode.com/problems/min-stack
127,Word Ladder,29.6%,Medium,0.09162341383415479, https://leetcode.com/problems/word-ladder
1116,Print Zero Even Odd,56.0%,Medium,0.08934510033584994, https://leetcode.com/problems/print-zero-even-odd
240,Search a 2D Matrix II,43.2%,Medium,0.08914990697180455, https://leetcode.com/problems/search-a-2d-matrix-ii
358,Rearrange String k Distance Apart,34.9%,Hard,0.08894748601649616, https://leetcode.com/problems/rearrange-string-k-distance-apart
102,Binary Tree Level Order Traversal,54.6%,Medium,0.0872240169150957, https://leetcode.com/problems/binary-tree-level-order-traversal
622,Design Circular Queue,43.8%,Medium,0.08696405427235052, https://leetcode.com/problems/design-circular-queue
105,Construct Binary Tree from Preorder and Inorder Traversal,48.8%,Medium,0.08645856912332787, https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
297,Serialize and Deserialize Binary Tree,47.5%,Hard,0.0834242216674795, https://leetcode.com/problems/serialize-and-deserialize-binary-tree
134,Gas Station,38.5%,Medium,0.08169138321871633, https://leetcode.com/problems/gas-station
636,Exclusive Time of Functions,51.9%,Medium,0.08155306616046964, https://leetcode.com/problems/exclusive-time-of-functions
89,Gray Code,49.1%,Medium,0.08112554481236843, https://leetcode.com/problems/gray-code
85,Maximal Rectangle,37.7%,Hard,0.0805588367172521, https://leetcode.com/problems/maximal-rectangle
695,Max Area of Island,62.7%,Medium,0.07677187782851674, https://leetcode.com/problems/max-area-of-island
1079,Letter Tile Possibilities,75.4%,Medium,0.07350246199292652, https://leetcode.com/problems/letter-tile-possibilities
98,Validate Binary Search Tree,27.8%,Medium,0.07111326337575957, https://leetcode.com/problems/validate-binary-search-tree
133,Clone Graph,34.8%,Medium,0.07095173597228444, https://leetcode.com/problems/clone-graph
126,Word Ladder II,22.1%,Hard,0.07011193038456472, https://leetcode.com/problems/word-ladder-ii
432,All O`one Data Structure,32.4%,Hard,0.06887402901251127, https://leetcode.com/problems/all-oone-data-structure
460,LFU Cache,34.2%,Hard,0.06836374280939023, https://leetcode.com/problems/lfu-cache
706,Design HashMap,61.3%,Easy,0.0683442674369718, https://leetcode.com/problems/design-hashmap
277,Find the Celebrity,41.8%,Medium,0.06562120535847293, https://leetcode.com/problems/find-the-celebrity
419,Battleships in a Board,70.0%,Medium,0.06557337705569365, https://leetcode.com/problems/battleships-in-a-board
702,Search in a Sorted Array of Unknown Size,66.9%,Medium,0.06361444899419297, https://leetcode.com/problems/search-in-a-sorted-array-of-unknown-size
1044,Longest Duplicate Substring,31.9%,Hard,0.062325463197828765, https://leetcode.com/problems/longest-duplicate-substring
380,Insert Delete GetRandom O(1),47.5%,Medium,0.05985510621029109, https://leetcode.com/problems/insert-delete-getrandom-o1
75,Sort Colors,47.3%,Medium,0.05950522970614658, https://leetcode.com/problems/sort-colors
49,Group Anagrams,56.9%,Medium,0.059194347436734636, https://leetcode.com/problems/group-anagrams
207,Course Schedule,43.1%,Medium,0.05917457139647936, https://leetcode.com/problems/course-schedule
8,String to Integer (atoi),15.4%,Medium,0.0590196151944673, https://leetcode.com/problems/string-to-integer-atoi
630,Course Schedule III,33.5%,Hard,0.058581901624802396, https://leetcode.com/problems/course-schedule-iii
457,Circular Array Loop,29.4%,Medium,0.058155920157074034, https://leetcode.com/problems/circular-array-loop
950,Reveal Cards In Increasing Order,74.6%,Medium,0.056592185311170023, https://leetcode.com/problems/reveal-cards-in-increasing-order
236,Lowest Common Ancestor of a Binary Tree,45.7%,Medium,0.05627201992757647, https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
315,Count of Smaller Numbers After Self,41.5%,Hard,0.05621430690495994, https://leetcode.com/problems/count-of-smaller-numbers-after-self
43,Multiply Strings,33.9%,Medium,0.05583052804728052, https://leetcode.com/problems/multiply-strings
149,Max Points on a Line,16.9%,Hard,0.0550597771830274, https://leetcode.com/problems/max-points-on-a-line
295,Find Median from Data Stream,44.3%,Hard,0.05495888428075748, https://leetcode.com/problems/find-median-from-data-stream
24,Swap Nodes in Pairs,50.4%,Medium,0.05465011300438079, https://leetcode.com/problems/swap-nodes-in-pairs
443,String Compression,41.3%,Easy,0.05450940566837169, https://leetcode.com/problems/string-compression
56,Merge Intervals,39.3%,Medium,0.054167920212564245, https://leetcode.com/problems/merge-intervals
1229,Meeting Scheduler,52.7%,Medium,0.053560323833736816, https://leetcode.com/problems/meeting-scheduler
679,24 Game,46.4%,Hard,0.05341723749698583, https://leetcode.com/problems/24-game
186,Reverse Words in a String II,43.3%,Medium,0.05064373281875492, https://leetcode.com/problems/reverse-words-in-a-string-ii
681,Next Closest Time,45.0%,Medium,0.05045206096038863, https://leetcode.com/problems/next-closest-time
129,Sum Root to Leaf Numbers,49.1%,Medium,0.050010420574661374, https://leetcode.com/problems/sum-root-to-leaf-numbers
253,Meeting Rooms II,45.7%,Medium,0.04945628059066218, https://leetcode.com/problems/meeting-rooms-ii
759,Employee Free Time,66.3%,Hard,0.04861224405509378, https://leetcode.com/problems/employee-free-time
845,Longest Mountain in Array,37.2%,Medium,0.047458490406358134, https://leetcode.com/problems/longest-mountain-in-array
556,Next Greater Element III,31.7%,Medium,0.04679216150675895, https://leetcode.com/problems/next-greater-element-iii
224,Basic Calculator,36.8%,Hard,0.046568165477211425, https://leetcode.com/problems/basic-calculator
69,Sqrt(x),33.9%,Easy,0.045007596057435977, https://leetcode.com/problems/sqrtx
36,Valid Sudoku,48.7%,Medium,0.04452302288876419, https://leetcode.com/problems/valid-sudoku
10,Regular Expression Matching,26.8%,Hard,0.04409107726484965, https://leetcode.com/problems/regular-expression-matching
148,Sort List,42.3%,Medium,0.04408427313201935, https://leetcode.com/problems/sort-list
171,Excel Sheet Column Number,55.9%,Easy,0.04404785815605299, https://leetcode.com/problems/excel-sheet-column-number
160,Intersection of Two Linked Lists,40.6%,Easy,0.043270781043381126, https://leetcode.com/problems/intersection-of-two-linked-lists
53,Maximum Subarray,46.5%,Easy,0.04299340685592046, https://leetcode.com/problems/maximum-subarray
727,Minimum Window Subsequence,41.8%,Hard,0.04237922296886145, https://leetcode.com/problems/minimum-window-subsequence
844,Backspace String Compare,46.4%,Easy,0.041499730906752734, https://leetcode.com/problems/backspace-string-compare
907,Sum of Subarray Minimums,32.3%,Medium,0.04069737616380998, https://leetcode.com/problems/sum-of-subarray-minimums
722,Remove Comments,34.6%,Medium,0.04049136135473691, https://leetcode.com/problems/remove-comments
346,Moving Average from Data Stream,70.9%,Easy,0.03932354620391436, https://leetcode.com/problems/moving-average-from-data-stream
17,Letter Combinations of a Phone Number,46.8%,Medium,0.03893646375009422, https://leetcode.com/problems/letter-combinations-of-a-phone-number
33,Search in Rotated Sorted Array,34.5%,Medium,0.03886602267922457, https://leetcode.com/problems/search-in-rotated-sorted-array
168,Excel Sheet Column Title,31.1%,Easy,0.03861483612777958, https://leetcode.com/problems/excel-sheet-column-title
1381,Design a Stack With Increment Operation,74.7%,Medium,0.038355612390321446, https://leetcode.com/problems/design-a-stack-with-increment-operation
317,Shortest Distance from All Buildings,41.4%,Hard,0.03795522000043556, https://leetcode.com/problems/shortest-distance-from-all-buildings
206,Reverse Linked List,62.5%,Easy,0.03679633286058156, https://leetcode.com/problems/reverse-linked-list
934,Shortest Bridge,48.2%,Medium,0.03607244121670154, https://leetcode.com/problems/shortest-bridge
208,Implement Trie (Prefix Tree),49.4%,Medium,0.03593469952792866, https://leetcode.com/problems/implement-trie-prefix-tree
128,Longest Consecutive Sequence,45.1%,Hard,0.035726058864721646, https://leetcode.com/problems/longest-consecutive-sequence
189,Rotate Array,34.7%,Easy,0.03569682997206547, https://leetcode.com/problems/rotate-array
21,Merge Two Sorted Lists,53.5%,Easy,0.03548634253021285, https://leetcode.com/problems/merge-two-sorted-lists
1304,Find N Unique Integers Sum up to Zero,76.3%,Easy,0.035408891906255915, https://leetcode.com/problems/find-n-unique-integers-sum-up-to-zero
59,Spiral Matrix II,53.9%,Medium,0.0351873674509732, https://leetcode.com/problems/spiral-matrix-ii
238,Product of Array Except Self,60.1%,Medium,0.03482987258052727, https://leetcode.com/problems/product-of-array-except-self
103,Binary Tree Zigzag Level Order Traversal,48.3%,Medium,0.03403976010989293, https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
567,Permutation in String,44.4%,Medium,0.033324075731591886, https://leetcode.com/problems/permutation-in-string
79,Word Search,35.6%,Medium,0.03318208821436187, https://leetcode.com/problems/word-search
528,Random Pick with Weight,43.9%,Medium,0.03306693626657339, https://leetcode.com/problems/random-pick-with-weight
239,Sliding Window Maximum,43.0%,Hard,0.031228142547585713, https://leetcode.com/problems/sliding-window-maximum
703,Kth Largest Element in a Stream,49.7%,Easy,0.031004894819414507, https://leetcode.com/problems/kth-largest-element-in-a-stream
38,Count and Say,44.6%,Easy,0.030956234663467107, https://leetcode.com/problems/count-and-say
557,Reverse Words in a String III,69.8%,Easy,0.03063547953861342, https://leetcode.com/problems/reverse-words-in-a-string-iii
44,Wildcard Matching,24.7%,Hard,0.030573033362282363, https://leetcode.com/problems/wildcard-matching
680,Valid Palindrome II,36.6%,Easy,0.028841220390439494, https://leetcode.com/problems/valid-palindrome-ii
269,Alien Dictionary,33.3%,Hard,0.02841997399127492, https://leetcode.com/problems/alien-dictionary
77,Combinations,54.7%,Medium,0.028021758737593695, https://leetcode.com/problems/combinations
20,Valid Parentheses,39.0%,Easy,0.02782373445001039, https://leetcode.com/problems/valid-parentheses
227,Basic Calculator II,36.9%,Medium,0.027685557859864054, https://leetcode.com/problems/basic-calculator-ii
5,Longest Palindromic Substring,29.5%,Medium,0.02757010450426751, https://leetcode.com/problems/longest-palindromic-substring
159,Longest Substring with At Most Two Distinct Characters,49.4%,Medium,0.02717558537896476, https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters
22,Generate Parentheses,62.7%,Medium,0.026949997964496694, https://leetcode.com/problems/generate-parentheses
2,Add Two Numbers,33.9%,Medium,0.02668158945866115, https://leetcode.com/problems/add-two-numbers
417,Pacific Atlantic Water Flow,41.1%,Medium,0.025975486403260657, https://leetcode.com/problems/pacific-atlantic-water-flow
987,Vertical Order Traversal of a Binary Tree,36.6%,Medium,0.025915645579833068, https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree
205,Isomorphic Strings,39.8%,Easy,0.025789394882914186, https://leetcode.com/problems/isomorphic-strings
362,Design Hit Counter,63.7%,Medium,0.025382073271417165, https://leetcode.com/problems/design-hit-counter
151,Reverse Words in a String,21.9%,Medium,0.024321004216273485, https://leetcode.com/problems/reverse-words-in-a-string
426,Convert Binary Search Tree to Sorted Doubly Linked List,59.1%,Medium,0.024214258120594613, https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list
140,Word Break II,32.6%,Hard,0.024104005752813337, https://leetcode.com/problems/word-break-ii
31,Next Permutation,32.6%,Medium,0.023747034562878154, https://leetcode.com/problems/next-permutation
252,Meeting Rooms,54.6%,Easy,0.02332467256640893, https://leetcode.com/problems/meeting-rooms
39,Combination Sum,56.1%,Medium,0.02267028230338623, https://leetcode.com/problems/combination-sum
449,Serialize and Deserialize BST,52.0%,Medium,0.02246023667974994, https://leetcode.com/problems/serialize-and-deserialize-bst
285,Inorder Successor in BST,40.4%,Medium,0.02233482010057984, https://leetcode.com/problems/inorder-successor-in-bst
113,Path Sum II,46.7%,Medium,0.021882711249507664, https://leetcode.com/problems/path-sum-ii
287,Find the Duplicate Number,55.5%,Medium,0.021825992579766168, https://leetcode.com/problems/find-the-duplicate-number
45,Jump Game II,30.6%,Hard,0.021353124470568974, https://leetcode.com/problems/jump-game-ii
621,Task Scheduler,50.1%,Medium,0.020881218065250198, https://leetcode.com/problems/task-scheduler
48,Rotate Image,56.7%,Medium,0.020228249775471566, https://leetcode.com/problems/rotate-image
166,Fraction to Recurring Decimal,21.6%,Medium,0.02015181543730795, https://leetcode.com/problems/fraction-to-recurring-decimal
399,Evaluate Division,51.6%,Medium,0.019380451549662482, https://leetcode.com/problems/evaluate-division
540,Single Element in a Sorted Array,57.9%,Medium,0.0192128868599912, https://leetcode.com/problems/single-element-in-a-sorted-array
173,Binary Search Tree Iterator,56.6%,Medium,0.01899993824490396, https://leetcode.com/problems/binary-search-tree-iterator
121,Best Time to Buy and Sell Stock,50.5%,Easy,0.018954919107260947, https://leetcode.com/problems/best-time-to-buy-and-sell-stock
532,K-diff Pairs in an Array,31.6%,Easy,0.018735911057469818, https://leetcode.com/problems/k-diff-pairs-in-an-array
169,Majority Element,58.7%,Easy,0.018694317054881164, https://leetcode.com/problems/majority-element
88,Merge Sorted Array,39.4%,Easy,0.018667009593356397, https://leetcode.com/problems/merge-sorted-array
394,Decode String,50.0%,Medium,0.0182820448374491, https://leetcode.com/problems/decode-string
234,Palindrome Linked List,39.3%,Easy,0.01801241989645556, https://leetcode.com/problems/palindrome-linked-list
872,Leaf-Similar Trees,64.5%,Easy,0.01752125418714782, https://leetcode.com/problems/leaf-similar-trees
993,Cousins in Binary Tree,52.0%,Easy,0.017414458368636587, https://leetcode.com/problems/cousins-in-binary-tree
994,Rotting Oranges,49.2%,Medium,0.017087941897195622, https://leetcode.com/problems/rotting-oranges
210,Course Schedule II,40.7%,Medium,0.01704828902223426, https://leetcode.com/problems/course-schedule-ii
34,Find First and Last Position of Element in Sorted Array,36.2%,Medium,0.01688338088311469, https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array
225,Implement Stack using Queues,45.1%,Easy,0.01644097863345757, https://leetcode.com/problems/implement-stack-using-queues
51,N-Queens,46.6%,Hard,0.016393809775676407, https://leetcode.com/problems/n-queens
299,Bulls and Cows,42.4%,Easy,0.016227536621756702, https://leetcode.com/problems/bulls-and-cows
110,Balanced Binary Tree,43.5%,Easy,0.015742847432510365, https://leetcode.com/problems/balanced-binary-tree
701,Insert into a Binary Search Tree,77.7%,Medium,0.015522236371561826, https://leetcode.com/problems/insert-into-a-binary-search-tree
139,Word Break,40.1%,Medium,0.015487677691351377, https://leetcode.com/problems/word-break
707,Design Linked List,24.5%,Medium,0.015054857167065819, https://leetcode.com/problems/design-linked-list
516,Longest Palindromic Subsequence,53.2%,Medium,0.014931221774984842, https://leetcode.com/problems/longest-palindromic-subsequence
832,Flipping an Image,76.2%,Easy,0.014652276786870392, https://leetcode.com/problems/flipping-an-image
653,Two Sum IV - Input is a BST,55.5%,Easy,0.014224990931347289, https://leetcode.com/problems/two-sum-iv-input-is-a-bst
3,Longest Substring Without Repeating Characters,30.4%,Medium,0.01391434345649413, https://leetcode.com/problems/longest-substring-without-repeating-characters
131,Palindrome Partitioning,47.5%,Medium,0.013903595538577326, https://leetcode.com/problems/palindrome-partitioning
141,Linked List Cycle,41.1%,Easy,0.01390238743679306, https://leetcode.com/problems/linked-list-cycle
724,Find Pivot Index,44.0%,Easy,0.013850636933899008, https://leetcode.com/problems/find-pivot-index
332,Reconstruct Itinerary,36.7%,Medium,0.013755375068485329, https://leetcode.com/problems/reconstruct-itinerary
15,3Sum,26.8%,Medium,0.013665148419080968, https://leetcode.com/problems/3sum
13,Roman to Integer,55.7%,Easy,0.013645103403569418, https://leetcode.com/problems/roman-to-integer
329,Longest Increasing Path in a Matrix,43.4%,Hard,0.013400535537482126, https://leetcode.com/problems/longest-increasing-path-in-a-matrix
91,Decode Ways,24.7%,Medium,0.013379120336324091, https://leetcode.com/problems/decode-ways
94,Binary Tree Inorder Traversal,63.3%,Medium,0.013353561806134713, https://leetcode.com/problems/binary-tree-inorder-traversal
199,Binary Tree Right Side View,54.1%,Medium,0.01274082919906162, https://leetcode.com/problems/binary-tree-right-side-view
518,Coin Change 2,50.2%,Medium,0.012527567532662891, https://leetcode.com/problems/coin-change-2
437,Path Sum III,47.2%,Medium,0.012128711446614806, https://leetcode.com/problems/path-sum-iii
543,Diameter of Binary Tree,48.4%,Easy,0.011898606798495848, https://leetcode.com/problems/diameter-of-binary-tree
442,Find All Duplicates in an Array,67.8%,Medium,0.011675555865241341, https://leetcode.com/problems/find-all-duplicates-in-an-array
378,Kth Smallest Element in a Sorted Matrix,54.3%,Medium,0.011634802567699611, https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix
117,Populating Next Right Pointers in Each Node II,39.1%,Medium,0.011389644764357807, https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
733,Flood Fill,55.3%,Easy,0.011217167530924988, https://leetcode.com/problems/flood-fill
268,Missing Number,51.7%,Easy,0.010947682628191997, https://leetcode.com/problems/missing-number
92,Reverse Linked List II,38.8%,Medium,0.010427623162259089, https://leetcode.com/problems/reverse-linked-list-ii
647,Palindromic Substrings,60.6%,Medium,0.010400509768078022, https://leetcode.com/problems/palindromic-substrings
61,Rotate List,30.0%,Medium,0.009925639799969955, https://leetcode.com/problems/rotate-list
18,4Sum,33.7%,Medium,0.00984259914419414, https://leetcode.com/problems/4sum
560,Subarray Sum Equals K,43.9%,Medium,0.009603146783199741, https://leetcode.com/problems/subarray-sum-equals-k
387,First Unique Character in a String,53.4%,Easy,0.009392680199054166, https://leetcode.com/problems/first-unique-character-in-a-string
1249,Minimum Remove to Make Valid Parentheses,62.5%,Medium,0.009195467093100304, https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses
32,Longest Valid Parentheses,28.4%,Hard,0.009111680351255843, https://leetcode.com/problems/longest-valid-parentheses
322,Coin Change,35.5%,Medium,0.00904437880665999, https://leetcode.com/problems/coin-change
28,Implement strStr(),34.5%,Easy,0.008850485542574548, https://leetcode.com/problems/implement-strstr
63,Unique Paths II,34.6%,Medium,0.008712753874961187, https://leetcode.com/problems/unique-paths-ii
198,House Robber,42.0%,Easy,0.008434914115059812, https://leetcode.com/problems/house-robber
209,Minimum Size Subarray Sum,38.2%,Medium,0.00841401682484616, https://leetcode.com/problems/minimum-size-subarray-sum
235,Lowest Common Ancestor of a Binary Search Tree,49.9%,Easy,0.00821697310228087, https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree
438,Find All Anagrams in a String,43.3%,Medium,0.008126822460497498, https://leetcode.com/problems/find-all-anagrams-in-a-string
26,Remove Duplicates from Sorted Array,45.1%,Easy,0.007782518973063169, https://leetcode.com/problems/remove-duplicates-from-sorted-array
328,Odd Even Linked List,55.7%,Medium,0.00764383618585562, https://leetcode.com/problems/odd-even-linked-list
876,Middle of the Linked List,68.4%,Easy,0.007624893975696915, https://leetcode.com/problems/middle-of-the-linked-list
415,Add Strings,47.5%,Easy,0.007587289812159497, https://leetcode.com/problems/add-strings
692,Top K Frequent Words,51.8%,Medium,0.007516006820935329, https://leetcode.com/problems/top-k-frequent-words
509,Fibonacci Number,67.2%,Easy,0.007113670403855555, https://leetcode.com/problems/fibonacci-number
204,Count Primes,31.5%,Easy,0.007072165261362441, https://leetcode.com/problems/count-primes
73,Set Matrix Zeroes,43.1%,Medium,0.0070151111959223245, https://leetcode.com/problems/set-matrix-zeroes
19,Remove Nth Node From End of List,35.2%,Medium,0.0069087555063702365, https://leetcode.com/problems/remove-nth-node-from-end-of-list
283,Move Zeroes,57.8%,Easy,0.006480437425856766, https://leetcode.com/problems/move-zeroes
83,Remove Duplicates from Sorted List,45.4%,Easy,0.006353261522609498, https://leetcode.com/problems/remove-duplicates-from-sorted-list
144,Binary Tree Preorder Traversal,55.7%,Medium,0.0060975798681185, https://leetcode.com/problems/binary-tree-preorder-traversal
108,Convert Sorted Array to Binary Search Tree,57.9%,Easy,0.005554027051374908, https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree
226,Invert Binary Tree,65.0%,Easy,0.005508138409792252, https://leetcode.com/problems/invert-binary-tree
300,Longest Increasing Subsequence,42.6%,Medium,0.005264555460003242, https://leetcode.com/problems/longest-increasing-subsequence
55,Jump Game,34.6%,Medium,0.005022612266291382, https://leetcode.com/problems/jump-game
62,Unique Paths,54.1%,Medium,0.004621080312067025, https://leetcode.com/problems/unique-paths
1470,Shuffle the Array,88.9%,Easy,0.004527967890154029, https://leetcode.com/problems/shuffle-the-array
7,Reverse Integer,25.8%,Easy,0.00418293972984512, https://leetcode.com/problems/reverse-integer
242,Valid Anagram,56.9%,Easy,0.004154123743115972, https://leetcode.com/problems/valid-anagram
215,Kth Largest Element in an Array,55.4%,Medium,0.003902443976931749, https://leetcode.com/problems/kth-largest-element-in-an-array
977,Squares of a Sorted Array,72.1%,Easy,0.003891055492966611, https://leetcode.com/problems/squares-of-a-sorted-array
153,Find Minimum in Rotated Sorted Array,45.1%,Medium,0.0037558729598054378, https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
101,Symmetric Tree,46.8%,Easy,0.0034057078469827435, https://leetcode.com/problems/symmetric-tree
122,Best Time to Buy and Sell Stock II,57.0%,Easy,0.0033545821461532107, https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
50,Pow(x, n),30.3%,Medium,0.0031510424503886844, https://leetcode.com/problems/powx-n
136,Single Number,65.5%,Easy,0.002869648285357666, https://leetcode.com/problems/single-number
104,Maximum Depth of Binary Tree,66.0%,Easy,0.002787846801433134, https://leetcode.com/problems/maximum-depth-of-binary-tree
106,Construct Binary Tree from Inorder and Postorder Traversal,47.2%,Medium,0.00234041415121758, https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal
70,Climbing Stairs,47.8%,Easy,0.0015084665529624085, https://leetcode.com/problems/climbing-stairs
1 1239 Maximum Length of a Concatenated String with Unique Characters 47.8% Medium 0.6657761816190897 https://leetcode.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters
2 1246 Palindrome Removal 46.0% Hard 0.5941286921253983 https://leetcode.com/problems/palindrome-removal
3 273 Integer to English Words 27.1% Hard 0.5224812026317068 https://leetcode.com/problems/integer-to-english-words
4 428 Serialize and Deserialize N-ary Tree 59.4% Hard 0.4508337131380154 https://leetcode.com/problems/serialize-and-deserialize-n-ary-tree
5 146 LRU Cache 33.2% Medium 0.37918622364432397 https://leetcode.com/problems/lru-cache
6 1156 Swap For Longest Repeated Character Substring 49.0% Medium 0.3764775712349121 https://leetcode.com/problems/swap-for-longest-repeated-character-substring
7 54 Spiral Matrix 34.1% Medium 0.35306273805914157 https://leetcode.com/problems/spiral-matrix
8 212 Word Search II 34.9% Hard 0.3492519632676119 https://leetcode.com/problems/word-search-ii
9 1236 Web Crawler 64.3% Medium 0.33647223662121295 https://leetcode.com/problems/web-crawler
10 545 Boundary of Binary Tree 38.9% Medium 0.32365154819215153 https://leetcode.com/problems/boundary-of-binary-tree
11 828 Count Unique Characters of All Substrings of a Given String 45.2% Hard 0.2972515234679316 https://leetcode.com/problems/count-unique-characters-of-all-substrings-of-a-given-string
12 200 Number of Islands 46.8% Medium 0.23204607197311616 https://leetcode.com/problems/number-of-islands
13 340 Longest Substring with At Most K Distinct Characters 44.1% Hard 0.2311568687093931 https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters
14 25 Reverse Nodes in k-Group 42.1% Hard 0.22841574636360815 https://leetcode.com/problems/reverse-nodes-in-k-group
15 218 The Skyline Problem 34.6% Hard 0.20884831112738325 https://leetcode.com/problems/the-skyline-problem
16 348 Design Tic-Tac-Toe 54.3% Medium 0.19933290262049122 https://leetcode.com/problems/design-tic-tac-toe
17 468 Validate IP Address 24.1% Medium 0.19827548473619627 https://leetcode.com/problems/validate-ip-address
18 1375 Bulb Switcher III 62.6% Medium 0.19622624370172712 https://leetcode.com/problems/bulb-switcher-iii
19 23 Merge k Sorted Lists 40.2% Hard 0.18142464262604538 https://leetcode.com/problems/merge-k-sorted-lists
20 138 Copy List with Random Pointer 36.4% Medium 0.17215255068496113 https://leetcode.com/problems/copy-list-with-random-pointer
21 179 Largest Number 28.8% Medium 0.15788342025694224 https://leetcode.com/problems/largest-number
22 450 Delete Node in a BST 43.1% Medium 0.15561959910053247 https://leetcode.com/problems/delete-node-in-a-bst
23 124 Binary Tree Maximum Path Sum 34.3% Hard 0.15512094811323265 https://leetcode.com/problems/binary-tree-maximum-path-sum
24 767 Reorganize String 48.7% Medium 0.15185314866152042 https://leetcode.com/problems/reorganize-string
25 1 Two Sum 45.6% Easy 0.14920101860781756 https://leetcode.com/problems/two-sum
26 41 First Missing Positive 32.0% Hard 0.14910731703527175 https://leetcode.com/problems/first-missing-positive
27 74 Search a 2D Matrix 36.5% Medium 0.13990475142949543 https://leetcode.com/problems/search-a-2d-matrix
28 99 Recover Binary Search Tree 39.7% Hard 0.1363765523041528 https://leetcode.com/problems/recover-binary-search-tree
29 42 Trapping Rain Water 48.9% Hard 0.12389276378675394 https://leetcode.com/problems/trapping-rain-water
30 46 Permutations 63.5% Medium 0.12027982804941116 https://leetcode.com/problems/permutations
31 93 Restore IP Addresses 35.6% Medium 0.11756123239496619 https://leetcode.com/problems/restore-ip-addresses
32 116 Populating Next Right Pointers in Each Node 45.2% Medium 0.1113806498369338 https://leetcode.com/problems/populating-next-right-pointers-in-each-node
33 1188 Design Bounded Blocking Queue 70.5% Medium 0.11030454201470608 https://leetcode.com/problems/design-bounded-blocking-queue
34 37 Sudoku Solver 43.6% Hard 0.1087554815281622 https://leetcode.com/problems/sudoku-solver
35 445 Add Two Numbers II 54.5% Medium 0.10585667046830217 https://leetcode.com/problems/add-two-numbers-ii
36 773 Sliding Puzzle 59.3% Hard 0.10294796925244239 https://leetcode.com/problems/sliding-puzzle
37 232 Implement Queue using Stacks 49.6% Easy 0.09690200534777553 https://leetcode.com/problems/implement-queue-using-stacks
38 716 Max Stack 42.6% Easy 0.09362342046209744 https://leetcode.com/problems/max-stack
39 4 Median of Two Sorted Arrays 29.6% Hard 0.09321199094445486 https://leetcode.com/problems/median-of-two-sorted-arrays
40 510 Inorder Successor in BST II 58.0% Medium 0.09244453252200126 https://leetcode.com/problems/inorder-successor-in-bst-ii
41 155 Min Stack 44.5% Easy 0.09202674518071384 https://leetcode.com/problems/min-stack
42 127 Word Ladder 29.6% Medium 0.09162341383415479 https://leetcode.com/problems/word-ladder
43 1116 Print Zero Even Odd 56.0% Medium 0.08934510033584994 https://leetcode.com/problems/print-zero-even-odd
44 240 Search a 2D Matrix II 43.2% Medium 0.08914990697180455 https://leetcode.com/problems/search-a-2d-matrix-ii
45 358 Rearrange String k Distance Apart 34.9% Hard 0.08894748601649616 https://leetcode.com/problems/rearrange-string-k-distance-apart
46 102 Binary Tree Level Order Traversal 54.6% Medium 0.0872240169150957 https://leetcode.com/problems/binary-tree-level-order-traversal
47 622 Design Circular Queue 43.8% Medium 0.08696405427235052 https://leetcode.com/problems/design-circular-queue
48 105 Construct Binary Tree from Preorder and Inorder Traversal 48.8% Medium 0.08645856912332787 https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
49 297 Serialize and Deserialize Binary Tree 47.5% Hard 0.0834242216674795 https://leetcode.com/problems/serialize-and-deserialize-binary-tree
50 134 Gas Station 38.5% Medium 0.08169138321871633 https://leetcode.com/problems/gas-station
51 636 Exclusive Time of Functions 51.9% Medium 0.08155306616046964 https://leetcode.com/problems/exclusive-time-of-functions
52 89 Gray Code 49.1% Medium 0.08112554481236843 https://leetcode.com/problems/gray-code
53 85 Maximal Rectangle 37.7% Hard 0.0805588367172521 https://leetcode.com/problems/maximal-rectangle
54 695 Max Area of Island 62.7% Medium 0.07677187782851674 https://leetcode.com/problems/max-area-of-island
55 1079 Letter Tile Possibilities 75.4% Medium 0.07350246199292652 https://leetcode.com/problems/letter-tile-possibilities
56 98 Validate Binary Search Tree 27.8% Medium 0.07111326337575957 https://leetcode.com/problems/validate-binary-search-tree
57 133 Clone Graph 34.8% Medium 0.07095173597228444 https://leetcode.com/problems/clone-graph
58 126 Word Ladder II 22.1% Hard 0.07011193038456472 https://leetcode.com/problems/word-ladder-ii
59 432 All O`one Data Structure 32.4% Hard 0.06887402901251127 https://leetcode.com/problems/all-oone-data-structure
60 460 LFU Cache 34.2% Hard 0.06836374280939023 https://leetcode.com/problems/lfu-cache
61 706 Design HashMap 61.3% Easy 0.0683442674369718 https://leetcode.com/problems/design-hashmap
62 277 Find the Celebrity 41.8% Medium 0.06562120535847293 https://leetcode.com/problems/find-the-celebrity
63 419 Battleships in a Board 70.0% Medium 0.06557337705569365 https://leetcode.com/problems/battleships-in-a-board
64 702 Search in a Sorted Array of Unknown Size 66.9% Medium 0.06361444899419297 https://leetcode.com/problems/search-in-a-sorted-array-of-unknown-size
65 1044 Longest Duplicate Substring 31.9% Hard 0.062325463197828765 https://leetcode.com/problems/longest-duplicate-substring
66 380 Insert Delete GetRandom O(1) 47.5% Medium 0.05985510621029109 https://leetcode.com/problems/insert-delete-getrandom-o1
67 75 Sort Colors 47.3% Medium 0.05950522970614658 https://leetcode.com/problems/sort-colors
68 49 Group Anagrams 56.9% Medium 0.059194347436734636 https://leetcode.com/problems/group-anagrams
69 207 Course Schedule 43.1% Medium 0.05917457139647936 https://leetcode.com/problems/course-schedule
70 8 String to Integer (atoi) 15.4% Medium 0.0590196151944673 https://leetcode.com/problems/string-to-integer-atoi
71 630 Course Schedule III 33.5% Hard 0.058581901624802396 https://leetcode.com/problems/course-schedule-iii
72 457 Circular Array Loop 29.4% Medium 0.058155920157074034 https://leetcode.com/problems/circular-array-loop
73 950 Reveal Cards In Increasing Order 74.6% Medium 0.056592185311170023 https://leetcode.com/problems/reveal-cards-in-increasing-order
74 236 Lowest Common Ancestor of a Binary Tree 45.7% Medium 0.05627201992757647 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
75 315 Count of Smaller Numbers After Self 41.5% Hard 0.05621430690495994 https://leetcode.com/problems/count-of-smaller-numbers-after-self
76 43 Multiply Strings 33.9% Medium 0.05583052804728052 https://leetcode.com/problems/multiply-strings
77 149 Max Points on a Line 16.9% Hard 0.0550597771830274 https://leetcode.com/problems/max-points-on-a-line
78 295 Find Median from Data Stream 44.3% Hard 0.05495888428075748 https://leetcode.com/problems/find-median-from-data-stream
79 24 Swap Nodes in Pairs 50.4% Medium 0.05465011300438079 https://leetcode.com/problems/swap-nodes-in-pairs
80 443 String Compression 41.3% Easy 0.05450940566837169 https://leetcode.com/problems/string-compression
81 56 Merge Intervals 39.3% Medium 0.054167920212564245 https://leetcode.com/problems/merge-intervals
82 1229 Meeting Scheduler 52.7% Medium 0.053560323833736816 https://leetcode.com/problems/meeting-scheduler
83 679 24 Game 46.4% Hard 0.05341723749698583 https://leetcode.com/problems/24-game
84 186 Reverse Words in a String II 43.3% Medium 0.05064373281875492 https://leetcode.com/problems/reverse-words-in-a-string-ii
85 681 Next Closest Time 45.0% Medium 0.05045206096038863 https://leetcode.com/problems/next-closest-time
86 129 Sum Root to Leaf Numbers 49.1% Medium 0.050010420574661374 https://leetcode.com/problems/sum-root-to-leaf-numbers
87 253 Meeting Rooms II 45.7% Medium 0.04945628059066218 https://leetcode.com/problems/meeting-rooms-ii
88 759 Employee Free Time 66.3% Hard 0.04861224405509378 https://leetcode.com/problems/employee-free-time
89 845 Longest Mountain in Array 37.2% Medium 0.047458490406358134 https://leetcode.com/problems/longest-mountain-in-array
90 556 Next Greater Element III 31.7% Medium 0.04679216150675895 https://leetcode.com/problems/next-greater-element-iii
91 224 Basic Calculator 36.8% Hard 0.046568165477211425 https://leetcode.com/problems/basic-calculator
92 69 Sqrt(x) 33.9% Easy 0.045007596057435977 https://leetcode.com/problems/sqrtx
93 36 Valid Sudoku 48.7% Medium 0.04452302288876419 https://leetcode.com/problems/valid-sudoku
94 10 Regular Expression Matching 26.8% Hard 0.04409107726484965 https://leetcode.com/problems/regular-expression-matching
95 148 Sort List 42.3% Medium 0.04408427313201935 https://leetcode.com/problems/sort-list
96 171 Excel Sheet Column Number 55.9% Easy 0.04404785815605299 https://leetcode.com/problems/excel-sheet-column-number
97 160 Intersection of Two Linked Lists 40.6% Easy 0.043270781043381126 https://leetcode.com/problems/intersection-of-two-linked-lists
98 53 Maximum Subarray 46.5% Easy 0.04299340685592046 https://leetcode.com/problems/maximum-subarray
99 727 Minimum Window Subsequence 41.8% Hard 0.04237922296886145 https://leetcode.com/problems/minimum-window-subsequence
100 844 Backspace String Compare 46.4% Easy 0.041499730906752734 https://leetcode.com/problems/backspace-string-compare
101 907 Sum of Subarray Minimums 32.3% Medium 0.04069737616380998 https://leetcode.com/problems/sum-of-subarray-minimums
102 722 Remove Comments 34.6% Medium 0.04049136135473691 https://leetcode.com/problems/remove-comments
103 346 Moving Average from Data Stream 70.9% Easy 0.03932354620391436 https://leetcode.com/problems/moving-average-from-data-stream
104 17 Letter Combinations of a Phone Number 46.8% Medium 0.03893646375009422 https://leetcode.com/problems/letter-combinations-of-a-phone-number
105 33 Search in Rotated Sorted Array 34.5% Medium 0.03886602267922457 https://leetcode.com/problems/search-in-rotated-sorted-array
106 168 Excel Sheet Column Title 31.1% Easy 0.03861483612777958 https://leetcode.com/problems/excel-sheet-column-title
107 1381 Design a Stack With Increment Operation 74.7% Medium 0.038355612390321446 https://leetcode.com/problems/design-a-stack-with-increment-operation
108 317 Shortest Distance from All Buildings 41.4% Hard 0.03795522000043556 https://leetcode.com/problems/shortest-distance-from-all-buildings
109 206 Reverse Linked List 62.5% Easy 0.03679633286058156 https://leetcode.com/problems/reverse-linked-list
110 934 Shortest Bridge 48.2% Medium 0.03607244121670154 https://leetcode.com/problems/shortest-bridge
111 208 Implement Trie (Prefix Tree) 49.4% Medium 0.03593469952792866 https://leetcode.com/problems/implement-trie-prefix-tree
112 128 Longest Consecutive Sequence 45.1% Hard 0.035726058864721646 https://leetcode.com/problems/longest-consecutive-sequence
113 189 Rotate Array 34.7% Easy 0.03569682997206547 https://leetcode.com/problems/rotate-array
114 21 Merge Two Sorted Lists 53.5% Easy 0.03548634253021285 https://leetcode.com/problems/merge-two-sorted-lists
115 1304 Find N Unique Integers Sum up to Zero 76.3% Easy 0.035408891906255915 https://leetcode.com/problems/find-n-unique-integers-sum-up-to-zero
116 59 Spiral Matrix II 53.9% Medium 0.0351873674509732 https://leetcode.com/problems/spiral-matrix-ii
117 238 Product of Array Except Self 60.1% Medium 0.03482987258052727 https://leetcode.com/problems/product-of-array-except-self
118 103 Binary Tree Zigzag Level Order Traversal 48.3% Medium 0.03403976010989293 https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
119 567 Permutation in String 44.4% Medium 0.033324075731591886 https://leetcode.com/problems/permutation-in-string
120 79 Word Search 35.6% Medium 0.03318208821436187 https://leetcode.com/problems/word-search
121 528 Random Pick with Weight 43.9% Medium 0.03306693626657339 https://leetcode.com/problems/random-pick-with-weight
122 239 Sliding Window Maximum 43.0% Hard 0.031228142547585713 https://leetcode.com/problems/sliding-window-maximum
123 703 Kth Largest Element in a Stream 49.7% Easy 0.031004894819414507 https://leetcode.com/problems/kth-largest-element-in-a-stream
124 38 Count and Say 44.6% Easy 0.030956234663467107 https://leetcode.com/problems/count-and-say
125 557 Reverse Words in a String III 69.8% Easy 0.03063547953861342 https://leetcode.com/problems/reverse-words-in-a-string-iii
126 44 Wildcard Matching 24.7% Hard 0.030573033362282363 https://leetcode.com/problems/wildcard-matching
127 680 Valid Palindrome II 36.6% Easy 0.028841220390439494 https://leetcode.com/problems/valid-palindrome-ii
128 269 Alien Dictionary 33.3% Hard 0.02841997399127492 https://leetcode.com/problems/alien-dictionary
129 77 Combinations 54.7% Medium 0.028021758737593695 https://leetcode.com/problems/combinations
130 20 Valid Parentheses 39.0% Easy 0.02782373445001039 https://leetcode.com/problems/valid-parentheses
131 227 Basic Calculator II 36.9% Medium 0.027685557859864054 https://leetcode.com/problems/basic-calculator-ii
132 5 Longest Palindromic Substring 29.5% Medium 0.02757010450426751 https://leetcode.com/problems/longest-palindromic-substring
133 159 Longest Substring with At Most Two Distinct Characters 49.4% Medium 0.02717558537896476 https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters
134 22 Generate Parentheses 62.7% Medium 0.026949997964496694 https://leetcode.com/problems/generate-parentheses
135 2 Add Two Numbers 33.9% Medium 0.02668158945866115 https://leetcode.com/problems/add-two-numbers
136 417 Pacific Atlantic Water Flow 41.1% Medium 0.025975486403260657 https://leetcode.com/problems/pacific-atlantic-water-flow
137 987 Vertical Order Traversal of a Binary Tree 36.6% Medium 0.025915645579833068 https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree
138 205 Isomorphic Strings 39.8% Easy 0.025789394882914186 https://leetcode.com/problems/isomorphic-strings
139 362 Design Hit Counter 63.7% Medium 0.025382073271417165 https://leetcode.com/problems/design-hit-counter
140 151 Reverse Words in a String 21.9% Medium 0.024321004216273485 https://leetcode.com/problems/reverse-words-in-a-string
141 426 Convert Binary Search Tree to Sorted Doubly Linked List 59.1% Medium 0.024214258120594613 https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list
142 140 Word Break II 32.6% Hard 0.024104005752813337 https://leetcode.com/problems/word-break-ii
143 31 Next Permutation 32.6% Medium 0.023747034562878154 https://leetcode.com/problems/next-permutation
144 252 Meeting Rooms 54.6% Easy 0.02332467256640893 https://leetcode.com/problems/meeting-rooms
145 39 Combination Sum 56.1% Medium 0.02267028230338623 https://leetcode.com/problems/combination-sum
146 449 Serialize and Deserialize BST 52.0% Medium 0.02246023667974994 https://leetcode.com/problems/serialize-and-deserialize-bst
147 285 Inorder Successor in BST 40.4% Medium 0.02233482010057984 https://leetcode.com/problems/inorder-successor-in-bst
148 113 Path Sum II 46.7% Medium 0.021882711249507664 https://leetcode.com/problems/path-sum-ii
149 287 Find the Duplicate Number 55.5% Medium 0.021825992579766168 https://leetcode.com/problems/find-the-duplicate-number
150 45 Jump Game II 30.6% Hard 0.021353124470568974 https://leetcode.com/problems/jump-game-ii
151 621 Task Scheduler 50.1% Medium 0.020881218065250198 https://leetcode.com/problems/task-scheduler
152 48 Rotate Image 56.7% Medium 0.020228249775471566 https://leetcode.com/problems/rotate-image
153 166 Fraction to Recurring Decimal 21.6% Medium 0.02015181543730795 https://leetcode.com/problems/fraction-to-recurring-decimal
154 399 Evaluate Division 51.6% Medium 0.019380451549662482 https://leetcode.com/problems/evaluate-division
155 540 Single Element in a Sorted Array 57.9% Medium 0.0192128868599912 https://leetcode.com/problems/single-element-in-a-sorted-array
156 173 Binary Search Tree Iterator 56.6% Medium 0.01899993824490396 https://leetcode.com/problems/binary-search-tree-iterator
157 121 Best Time to Buy and Sell Stock 50.5% Easy 0.018954919107260947 https://leetcode.com/problems/best-time-to-buy-and-sell-stock
158 532 K-diff Pairs in an Array 31.6% Easy 0.018735911057469818 https://leetcode.com/problems/k-diff-pairs-in-an-array
159 169 Majority Element 58.7% Easy 0.018694317054881164 https://leetcode.com/problems/majority-element
160 88 Merge Sorted Array 39.4% Easy 0.018667009593356397 https://leetcode.com/problems/merge-sorted-array
161 394 Decode String 50.0% Medium 0.0182820448374491 https://leetcode.com/problems/decode-string
162 234 Palindrome Linked List 39.3% Easy 0.01801241989645556 https://leetcode.com/problems/palindrome-linked-list
163 872 Leaf-Similar Trees 64.5% Easy 0.01752125418714782 https://leetcode.com/problems/leaf-similar-trees
164 993 Cousins in Binary Tree 52.0% Easy 0.017414458368636587 https://leetcode.com/problems/cousins-in-binary-tree
165 994 Rotting Oranges 49.2% Medium 0.017087941897195622 https://leetcode.com/problems/rotting-oranges
166 210 Course Schedule II 40.7% Medium 0.01704828902223426 https://leetcode.com/problems/course-schedule-ii
167 34 Find First and Last Position of Element in Sorted Array 36.2% Medium 0.01688338088311469 https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array
168 225 Implement Stack using Queues 45.1% Easy 0.01644097863345757 https://leetcode.com/problems/implement-stack-using-queues
169 51 N-Queens 46.6% Hard 0.016393809775676407 https://leetcode.com/problems/n-queens
170 299 Bulls and Cows 42.4% Easy 0.016227536621756702 https://leetcode.com/problems/bulls-and-cows
171 110 Balanced Binary Tree 43.5% Easy 0.015742847432510365 https://leetcode.com/problems/balanced-binary-tree
172 701 Insert into a Binary Search Tree 77.7% Medium 0.015522236371561826 https://leetcode.com/problems/insert-into-a-binary-search-tree
173 139 Word Break 40.1% Medium 0.015487677691351377 https://leetcode.com/problems/word-break
174 707 Design Linked List 24.5% Medium 0.015054857167065819 https://leetcode.com/problems/design-linked-list
175 516 Longest Palindromic Subsequence 53.2% Medium 0.014931221774984842 https://leetcode.com/problems/longest-palindromic-subsequence
176 832 Flipping an Image 76.2% Easy 0.014652276786870392 https://leetcode.com/problems/flipping-an-image
177 653 Two Sum IV - Input is a BST 55.5% Easy 0.014224990931347289 https://leetcode.com/problems/two-sum-iv-input-is-a-bst
178 3 Longest Substring Without Repeating Characters 30.4% Medium 0.01391434345649413 https://leetcode.com/problems/longest-substring-without-repeating-characters
179 131 Palindrome Partitioning 47.5% Medium 0.013903595538577326 https://leetcode.com/problems/palindrome-partitioning
180 141 Linked List Cycle 41.1% Easy 0.01390238743679306 https://leetcode.com/problems/linked-list-cycle
181 724 Find Pivot Index 44.0% Easy 0.013850636933899008 https://leetcode.com/problems/find-pivot-index
182 332 Reconstruct Itinerary 36.7% Medium 0.013755375068485329 https://leetcode.com/problems/reconstruct-itinerary
183 15 3Sum 26.8% Medium 0.013665148419080968 https://leetcode.com/problems/3sum
184 13 Roman to Integer 55.7% Easy 0.013645103403569418 https://leetcode.com/problems/roman-to-integer
185 329 Longest Increasing Path in a Matrix 43.4% Hard 0.013400535537482126 https://leetcode.com/problems/longest-increasing-path-in-a-matrix
186 91 Decode Ways 24.7% Medium 0.013379120336324091 https://leetcode.com/problems/decode-ways
187 94 Binary Tree Inorder Traversal 63.3% Medium 0.013353561806134713 https://leetcode.com/problems/binary-tree-inorder-traversal
188 199 Binary Tree Right Side View 54.1% Medium 0.01274082919906162 https://leetcode.com/problems/binary-tree-right-side-view
189 518 Coin Change 2 50.2% Medium 0.012527567532662891 https://leetcode.com/problems/coin-change-2
190 437 Path Sum III 47.2% Medium 0.012128711446614806 https://leetcode.com/problems/path-sum-iii
191 543 Diameter of Binary Tree 48.4% Easy 0.011898606798495848 https://leetcode.com/problems/diameter-of-binary-tree
192 442 Find All Duplicates in an Array 67.8% Medium 0.011675555865241341 https://leetcode.com/problems/find-all-duplicates-in-an-array
193 378 Kth Smallest Element in a Sorted Matrix 54.3% Medium 0.011634802567699611 https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix
194 117 Populating Next Right Pointers in Each Node II 39.1% Medium 0.011389644764357807 https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
195 733 Flood Fill 55.3% Easy 0.011217167530924988 https://leetcode.com/problems/flood-fill
196 268 Missing Number 51.7% Easy 0.010947682628191997 https://leetcode.com/problems/missing-number
197 92 Reverse Linked List II 38.8% Medium 0.010427623162259089 https://leetcode.com/problems/reverse-linked-list-ii
198 647 Palindromic Substrings 60.6% Medium 0.010400509768078022 https://leetcode.com/problems/palindromic-substrings
199 61 Rotate List 30.0% Medium 0.009925639799969955 https://leetcode.com/problems/rotate-list
200 18 4Sum 33.7% Medium 0.00984259914419414 https://leetcode.com/problems/4sum
201 560 Subarray Sum Equals K 43.9% Medium 0.009603146783199741 https://leetcode.com/problems/subarray-sum-equals-k
202 387 First Unique Character in a String 53.4% Easy 0.009392680199054166 https://leetcode.com/problems/first-unique-character-in-a-string
203 1249 Minimum Remove to Make Valid Parentheses 62.5% Medium 0.009195467093100304 https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses
204 32 Longest Valid Parentheses 28.4% Hard 0.009111680351255843 https://leetcode.com/problems/longest-valid-parentheses
205 322 Coin Change 35.5% Medium 0.00904437880665999 https://leetcode.com/problems/coin-change
206 28 Implement strStr() 34.5% Easy 0.008850485542574548 https://leetcode.com/problems/implement-strstr
207 63 Unique Paths II 34.6% Medium 0.008712753874961187 https://leetcode.com/problems/unique-paths-ii
208 198 House Robber 42.0% Easy 0.008434914115059812 https://leetcode.com/problems/house-robber
209 209 Minimum Size Subarray Sum 38.2% Medium 0.00841401682484616 https://leetcode.com/problems/minimum-size-subarray-sum
210 235 Lowest Common Ancestor of a Binary Search Tree 49.9% Easy 0.00821697310228087 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree
211 438 Find All Anagrams in a String 43.3% Medium 0.008126822460497498 https://leetcode.com/problems/find-all-anagrams-in-a-string
212 26 Remove Duplicates from Sorted Array 45.1% Easy 0.007782518973063169 https://leetcode.com/problems/remove-duplicates-from-sorted-array
213 328 Odd Even Linked List 55.7% Medium 0.00764383618585562 https://leetcode.com/problems/odd-even-linked-list
214 876 Middle of the Linked List 68.4% Easy 0.007624893975696915 https://leetcode.com/problems/middle-of-the-linked-list
215 415 Add Strings 47.5% Easy 0.007587289812159497 https://leetcode.com/problems/add-strings
216 692 Top K Frequent Words 51.8% Medium 0.007516006820935329 https://leetcode.com/problems/top-k-frequent-words
217 509 Fibonacci Number 67.2% Easy 0.007113670403855555 https://leetcode.com/problems/fibonacci-number
218 204 Count Primes 31.5% Easy 0.007072165261362441 https://leetcode.com/problems/count-primes
219 73 Set Matrix Zeroes 43.1% Medium 0.0070151111959223245 https://leetcode.com/problems/set-matrix-zeroes
220 19 Remove Nth Node From End of List 35.2% Medium 0.0069087555063702365 https://leetcode.com/problems/remove-nth-node-from-end-of-list
221 283 Move Zeroes 57.8% Easy 0.006480437425856766 https://leetcode.com/problems/move-zeroes
222 83 Remove Duplicates from Sorted List 45.4% Easy 0.006353261522609498 https://leetcode.com/problems/remove-duplicates-from-sorted-list
223 144 Binary Tree Preorder Traversal 55.7% Medium 0.0060975798681185 https://leetcode.com/problems/binary-tree-preorder-traversal
224 108 Convert Sorted Array to Binary Search Tree 57.9% Easy 0.005554027051374908 https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree
225 226 Invert Binary Tree 65.0% Easy 0.005508138409792252 https://leetcode.com/problems/invert-binary-tree
226 300 Longest Increasing Subsequence 42.6% Medium 0.005264555460003242 https://leetcode.com/problems/longest-increasing-subsequence
227 55 Jump Game 34.6% Medium 0.005022612266291382 https://leetcode.com/problems/jump-game
228 62 Unique Paths 54.1% Medium 0.004621080312067025 https://leetcode.com/problems/unique-paths
229 1470 Shuffle the Array 88.9% Easy 0.004527967890154029 https://leetcode.com/problems/shuffle-the-array
230 7 Reverse Integer 25.8% Easy 0.00418293972984512 https://leetcode.com/problems/reverse-integer
231 242 Valid Anagram 56.9% Easy 0.004154123743115972 https://leetcode.com/problems/valid-anagram
232 215 Kth Largest Element in an Array 55.4% Medium 0.003902443976931749 https://leetcode.com/problems/kth-largest-element-in-an-array
233 977 Squares of a Sorted Array 72.1% Easy 0.003891055492966611 https://leetcode.com/problems/squares-of-a-sorted-array
234 153 Find Minimum in Rotated Sorted Array 45.1% Medium 0.0037558729598054378 https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
235 101 Symmetric Tree 46.8% Easy 0.0034057078469827435 https://leetcode.com/problems/symmetric-tree
236 122 Best Time to Buy and Sell Stock II 57.0% Easy 0.0033545821461532107 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
237 50 Pow(x n) 30.3% Medium 0.0031510424503886844 https://leetcode.com/problems/powx-n
238 136 Single Number 65.5% Easy 0.002869648285357666 https://leetcode.com/problems/single-number
239 104 Maximum Depth of Binary Tree 66.0% Easy 0.002787846801433134 https://leetcode.com/problems/maximum-depth-of-binary-tree
240 106 Construct Binary Tree from Inorder and Postorder Traversal 47.2% Medium 0.00234041415121758 https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal
241 70 Climbing Stairs 47.8% Easy 0.0015084665529624085 https://leetcode.com/problems/climbing-stairs