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Chore: Add headers to all the files (#54)

Browse Source 
## Description
- Add headers to all the CSV files

## Script used
```py
import csv
import os

# Set the path of the folder containing the CSV files
folder_path = "./LeetCode-Questions-CompanyWise"
headers = [
    "ID",
    "Title",
    "Acceptance",
    "Difficulty",
    "Frequency",
    "Leetcode Question Link",
]

# Loop through all the CSV files in the folder
for file_name in os.listdir(folder_path):
    if file_name.endswith(".csv"):
        # Read the CSV file into a list of rows
        file_path = os.path.join(folder_path, file_name)
        with open(file_path, "r") as f:
            reader = csv.reader(f)
            rows = list(reader)

        has_headers = False
        if len(rows) > 0 and rows[0] == headers:
            has_headers = True

        if not has_headers:
            rows.insert(0, headers)

            # Write the list of rows back to the CSV file
            with open(file_path, "w", newline="") as f:
                writer = csv.writer(f)
                writer.writerows(rows)

```
This commit is contained in:
Krishna Kumar Dey
2023-04-01 11:07:49 +05:30
committed by GitHub
parent 0aeadbd612
commit fb5f78b55e
534 changed files with 20291 additions and 19757 deletions
Download Patch File Download Diff File Expand all files Collapse all files

155
ebay_6months.csv
View File

@@ -1,77 +1,78 @@
545,Boundary of Binary Tree,38.9%,Medium,0.09349966258159505, https://leetcode.com/problems/boundary-of-binary-tree
250,Count Univalue Subtrees,52.0%,Medium,0.07975881838845024, https://leetcode.com/problems/count-univalue-subtrees
244,Shortest Word Distance II,52.3%,Medium,0.07622736538788424, https://leetcode.com/problems/shortest-word-distance-ii
146,LRU Cache,33.2%,Medium,0.07118067822062889, https://leetcode.com/problems/lru-cache
846,Hand of Straights,54.2%,Medium,0.06472423940349638, https://leetcode.com/problems/hand-of-straights
968,Binary Tree Cameras,37.5%,Hard,0.05790329283155908, https://leetcode.com/problems/binary-tree-cameras
253,Meeting Rooms II,45.7%,Medium,0.04945628059066218, https://leetcode.com/problems/meeting-rooms-ii
143,Reorder List,37.1%,Medium,0.04554002588608351, https://leetcode.com/problems/reorder-list
1146,Snapshot Array,37.0%,Medium,0.0317991816929387, https://leetcode.com/problems/snapshot-array
284,Peeking Iterator,45.7%,Medium,0.03110670713225487, https://leetcode.com/problems/peeking-iterator
227,Basic Calculator II,36.9%,Medium,0.027685557859864054, https://leetcode.com/problems/basic-calculator-ii
498,Diagonal Traverse,48.2%,Medium,0.02756894104498661, https://leetcode.com/problems/diagonal-traverse
1438,Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit,42.1%,Medium,0.026955809988528263, https://leetcode.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit
130,Surrounded Regions,28.1%,Medium,0.02672368055211276, https://leetcode.com/problems/surrounded-regions
951,Flip Equivalent Binary Trees,65.8%,Medium,0.025269822188076344, https://leetcode.com/problems/flip-equivalent-binary-trees
40,Combination Sum II,48.2%,Medium,0.021424290044083395, https://leetcode.com/problems/combination-sum-ii
341,Flatten Nested List Iterator,52.9%,Medium,0.019980684690483426, https://leetcode.com/problems/flatten-nested-list-iterator
787,Cheapest Flights Within K Stops,39.3%,Medium,0.018824085245635554, https://leetcode.com/problems/cheapest-flights-within-k-stops
283,Move Zeroes,57.8%,Easy,0.01789853050377608, https://leetcode.com/problems/move-zeroes
240,Search a 2D Matrix II,43.2%,Medium,0.0169815401480941, https://leetcode.com/problems/search-a-2d-matrix-ii
658,Find K Closest Elements,40.9%,Medium,0.016611677666896175, https://leetcode.com/problems/find-k-closest-elements
51,N-Queens,46.6%,Hard,0.016393809775676407, https://leetcode.com/problems/n-queens
297,Serialize and Deserialize Binary Tree,47.5%,Hard,0.01585377577217724, https://leetcode.com/problems/serialize-and-deserialize-binary-tree
215,Kth Largest Element in an Array,55.4%,Medium,0.015519225147600912, https://leetcode.com/problems/kth-largest-element-in-an-array
153,Find Minimum in Rotated Sorted Array,45.1%,Medium,0.014939586916186732, https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
443,String Compression,41.3%,Easy,0.01390843004613198, https://leetcode.com/problems/string-compression
703,Kth Largest Element in a Stream,49.7%,Easy,0.013898764390814973, https://leetcode.com/problems/kth-largest-element-in-a-stream
138,Copy List with Random Pointer,36.4%,Medium,0.013876263355766411, https://leetcode.com/problems/copy-list-with-random-pointer
767,Reorganize String,48.7%,Medium,0.01329806830463147, https://leetcode.com/problems/reorganize-string
665,Non-decreasing Array,19.5%,Easy,0.013016779950191773, https://leetcode.com/problems/non-decreasing-array
33,Search in Rotated Sorted Array,34.5%,Medium,0.012857779194289386, https://leetcode.com/problems/search-in-rotated-sorted-array
129,Sum Root to Leaf Numbers,49.1%,Medium,0.012739025777429757, https://leetcode.com/problems/sum-root-to-leaf-numbers
213,House Robber II,36.5%,Medium,0.012654392210497564, https://leetcode.com/problems/house-robber-ii
445,Add Two Numbers II,54.5%,Medium,0.01233061245747872, https://leetcode.com/problems/add-two-numbers-ii
547,Friend Circles,58.6%,Medium,0.012228828639434596, https://leetcode.com/problems/friend-circles
300,Longest Increasing Subsequence,42.6%,Medium,0.011806512586989004, https://leetcode.com/problems/longest-increasing-subsequence
200,Number of Islands,46.8%,Medium,0.011509262420590827, https://leetcode.com/problems/number-of-islands
785,Is Graph Bipartite?,47.5%,Medium,0.011236073266925854, https://leetcode.com/problems/is-graph-bipartite
160,Intersection of Two Linked Lists,40.6%,Easy,0.010994491398666248, https://leetcode.com/problems/intersection-of-two-linked-lists
662,Maximum Width of Binary Tree,41.0%,Medium,0.010790501245113902, https://leetcode.com/problems/maximum-width-of-binary-tree
17,Letter Combinations of a Phone Number,46.8%,Medium,0.00987716546167603, https://leetcode.com/problems/letter-combinations-of-a-phone-number
3,Longest Substring Without Repeating Characters,30.4%,Medium,0.009683242444739549, https://leetcode.com/problems/longest-substring-without-repeating-characters
560,Subarray Sum Equals K,43.9%,Medium,0.009603146783199741, https://leetcode.com/problems/subarray-sum-equals-k
46,Permutations,63.5%,Medium,0.009461803137288448, https://leetcode.com/problems/permutations
23,Merge k Sorted Lists,40.2%,Hard,0.009092808657599025, https://leetcode.com/problems/merge-k-sorted-lists
5,Longest Palindromic Substring,29.5%,Medium,0.009086325220960808, https://leetcode.com/problems/longest-palindromic-substring
977,Squares of a Sorted Array,72.1%,Easy,0.008733679968754604, https://leetcode.com/problems/squares-of-a-sorted-array
394,Decode String,50.0%,Medium,0.008166644000272283, https://leetcode.com/problems/decode-string
56,Merge Intervals,39.3%,Medium,0.007796972706004796, https://leetcode.com/problems/merge-intervals
994,Rotting Oranges,49.2%,Medium,0.007630712341163886, https://leetcode.com/problems/rotting-oranges
1,Two Sum,45.6%,Easy,0.0073613942765888805, https://leetcode.com/problems/two-sum
41,First Missing Positive,32.0%,Hard,0.0064113058208121855, https://leetcode.com/problems/first-missing-positive
83,Remove Duplicates from Sorted List,45.4%,Easy,0.006353261522609498, https://leetcode.com/problems/remove-duplicates-from-sorted-list
202,Happy Number,50.4%,Easy,0.006266666286010046, https://leetcode.com/problems/happy-number
76,Minimum Window Substring,34.6%,Hard,0.006231520398723243, https://leetcode.com/problems/minimum-window-substring
31,Next Permutation,32.6%,Medium,0.005989835219179644, https://leetcode.com/problems/next-permutation
39,Combination Sum,56.1%,Medium,0.005715934396440999, https://leetcode.com/problems/combination-sum
199,Binary Tree Right Side View,54.1%,Medium,0.0056826406650506926, https://leetcode.com/problems/binary-tree-right-side-view
206,Reverse Linked List,62.5%,Easy,0.005257021452801617, https://leetcode.com/problems/reverse-linked-list
20,Valid Parentheses,39.0%,Easy,0.005168860577665306, https://leetcode.com/problems/valid-parentheses
42,Trapping Rain Water,48.9%,Hard,0.004350670338744988, https://leetcode.com/problems/trapping-rain-water
322,Coin Change,35.5%,Medium,0.004029826126500844, https://leetcode.com/problems/coin-change
189,Rotate Array,34.7%,Easy,0.004029826126500844, https://leetcode.com/problems/rotate-array
238,Product of Array Except Self,60.1%,Medium,0.003930436424724545, https://leetcode.com/problems/product-of-array-except-self
139,Word Break,40.1%,Medium,0.003894465052690167, https://leetcode.com/problems/word-break
103,Binary Tree Zigzag Level Order Traversal,48.3%,Medium,0.003839922800048048, https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
8,String to Integer (atoi),15.4%,Medium,0.0037925521897059712, https://leetcode.com/problems/string-to-integer-atoi
198,House Robber,42.0%,Easy,0.0037576371128333645, https://leetcode.com/problems/house-robber
102,Binary Tree Level Order Traversal,54.6%,Medium,0.003639014205004082, https://leetcode.com/problems/binary-tree-level-order-traversal
141,Linked List Cycle,41.1%,Easy,0.0034937584669245472, https://leetcode.com/problems/linked-list-cycle
347,Top K Frequent Elements,61.2%,Medium,0.0033396446491217604, https://leetcode.com/problems/top-k-frequent-elements
14,Longest Common Prefix,35.4%,Easy,0.003320331762984143, https://leetcode.com/problems/longest-common-prefix
66,Plus One,43.0%,Easy,0.00326211347832938, https://leetcode.com/problems/plus-one
98,Validate Binary Search Tree,27.8%,Medium,0.002943776044013381, https://leetcode.com/problems/validate-binary-search-tree
21,Merge Two Sorted Lists,53.5%,Easy,0.0022551737583973706, https://leetcode.com/problems/merge-two-sorted-lists
15,3Sum,26.8%,Medium,0.0021990113314367685, https://leetcode.com/problems/3sum
50,Pow(x;n),30.3%,Medium,0.0014016892647828818, https://leetcode.com/problems/powx-n
ID,Title,Acceptance,Difficulty,Frequency,Leetcode Question Link
545,Boundary of Binary Tree,38.9%,Medium,0.09349966258159505, https://leetcode.com/problems/boundary-of-binary-tree
250,Count Univalue Subtrees,52.0%,Medium,0.07975881838845024, https://leetcode.com/problems/count-univalue-subtrees
244,Shortest Word Distance II,52.3%,Medium,0.07622736538788424, https://leetcode.com/problems/shortest-word-distance-ii
146,LRU Cache,33.2%,Medium,0.07118067822062889, https://leetcode.com/problems/lru-cache
846,Hand of Straights,54.2%,Medium,0.06472423940349638, https://leetcode.com/problems/hand-of-straights
968,Binary Tree Cameras,37.5%,Hard,0.05790329283155908, https://leetcode.com/problems/binary-tree-cameras
253,Meeting Rooms II,45.7%,Medium,0.04945628059066218, https://leetcode.com/problems/meeting-rooms-ii
143,Reorder List,37.1%,Medium,0.04554002588608351, https://leetcode.com/problems/reorder-list
1146,Snapshot Array,37.0%,Medium,0.0317991816929387, https://leetcode.com/problems/snapshot-array
284,Peeking Iterator,45.7%,Medium,0.03110670713225487, https://leetcode.com/problems/peeking-iterator
227,Basic Calculator II,36.9%,Medium,0.027685557859864054, https://leetcode.com/problems/basic-calculator-ii
498,Diagonal Traverse,48.2%,Medium,0.02756894104498661, https://leetcode.com/problems/diagonal-traverse
1438,Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit,42.1%,Medium,0.026955809988528263, https://leetcode.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit
130,Surrounded Regions,28.1%,Medium,0.02672368055211276, https://leetcode.com/problems/surrounded-regions
951,Flip Equivalent Binary Trees,65.8%,Medium,0.025269822188076344, https://leetcode.com/problems/flip-equivalent-binary-trees
40,Combination Sum II,48.2%,Medium,0.021424290044083395, https://leetcode.com/problems/combination-sum-ii
341,Flatten Nested List Iterator,52.9%,Medium,0.019980684690483426, https://leetcode.com/problems/flatten-nested-list-iterator
787,Cheapest Flights Within K Stops,39.3%,Medium,0.018824085245635554, https://leetcode.com/problems/cheapest-flights-within-k-stops
283,Move Zeroes,57.8%,Easy,0.01789853050377608, https://leetcode.com/problems/move-zeroes
240,Search a 2D Matrix II,43.2%,Medium,0.0169815401480941, https://leetcode.com/problems/search-a-2d-matrix-ii
658,Find K Closest Elements,40.9%,Medium,0.016611677666896175, https://leetcode.com/problems/find-k-closest-elements
51,N-Queens,46.6%,Hard,0.016393809775676407, https://leetcode.com/problems/n-queens
297,Serialize and Deserialize Binary Tree,47.5%,Hard,0.01585377577217724, https://leetcode.com/problems/serialize-and-deserialize-binary-tree
215,Kth Largest Element in an Array,55.4%,Medium,0.015519225147600912, https://leetcode.com/problems/kth-largest-element-in-an-array
153,Find Minimum in Rotated Sorted Array,45.1%,Medium,0.014939586916186732, https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
443,String Compression,41.3%,Easy,0.01390843004613198, https://leetcode.com/problems/string-compression
703,Kth Largest Element in a Stream,49.7%,Easy,0.013898764390814973, https://leetcode.com/problems/kth-largest-element-in-a-stream
138,Copy List with Random Pointer,36.4%,Medium,0.013876263355766411, https://leetcode.com/problems/copy-list-with-random-pointer
767,Reorganize String,48.7%,Medium,0.01329806830463147, https://leetcode.com/problems/reorganize-string
665,Non-decreasing Array,19.5%,Easy,0.013016779950191773, https://leetcode.com/problems/non-decreasing-array
33,Search in Rotated Sorted Array,34.5%,Medium,0.012857779194289386, https://leetcode.com/problems/search-in-rotated-sorted-array
129,Sum Root to Leaf Numbers,49.1%,Medium,0.012739025777429757, https://leetcode.com/problems/sum-root-to-leaf-numbers
213,House Robber II,36.5%,Medium,0.012654392210497564, https://leetcode.com/problems/house-robber-ii
445,Add Two Numbers II,54.5%,Medium,0.01233061245747872, https://leetcode.com/problems/add-two-numbers-ii
547,Friend Circles,58.6%,Medium,0.012228828639434596, https://leetcode.com/problems/friend-circles
300,Longest Increasing Subsequence,42.6%,Medium,0.011806512586989004, https://leetcode.com/problems/longest-increasing-subsequence
200,Number of Islands,46.8%,Medium,0.011509262420590827, https://leetcode.com/problems/number-of-islands
785,Is Graph Bipartite?,47.5%,Medium,0.011236073266925854, https://leetcode.com/problems/is-graph-bipartite
160,Intersection of Two Linked Lists,40.6%,Easy,0.010994491398666248, https://leetcode.com/problems/intersection-of-two-linked-lists
662,Maximum Width of Binary Tree,41.0%,Medium,0.010790501245113902, https://leetcode.com/problems/maximum-width-of-binary-tree
17,Letter Combinations of a Phone Number,46.8%,Medium,0.00987716546167603, https://leetcode.com/problems/letter-combinations-of-a-phone-number
3,Longest Substring Without Repeating Characters,30.4%,Medium,0.009683242444739549, https://leetcode.com/problems/longest-substring-without-repeating-characters
560,Subarray Sum Equals K,43.9%,Medium,0.009603146783199741, https://leetcode.com/problems/subarray-sum-equals-k
46,Permutations,63.5%,Medium,0.009461803137288448, https://leetcode.com/problems/permutations
23,Merge k Sorted Lists,40.2%,Hard,0.009092808657599025, https://leetcode.com/problems/merge-k-sorted-lists
5,Longest Palindromic Substring,29.5%,Medium,0.009086325220960808, https://leetcode.com/problems/longest-palindromic-substring
977,Squares of a Sorted Array,72.1%,Easy,0.008733679968754604, https://leetcode.com/problems/squares-of-a-sorted-array
394,Decode String,50.0%,Medium,0.008166644000272283, https://leetcode.com/problems/decode-string
56,Merge Intervals,39.3%,Medium,0.007796972706004796, https://leetcode.com/problems/merge-intervals
994,Rotting Oranges,49.2%,Medium,0.007630712341163886, https://leetcode.com/problems/rotting-oranges
1,Two Sum,45.6%,Easy,0.0073613942765888805, https://leetcode.com/problems/two-sum
41,First Missing Positive,32.0%,Hard,0.0064113058208121855, https://leetcode.com/problems/first-missing-positive
83,Remove Duplicates from Sorted List,45.4%,Easy,0.006353261522609498, https://leetcode.com/problems/remove-duplicates-from-sorted-list
202,Happy Number,50.4%,Easy,0.006266666286010046, https://leetcode.com/problems/happy-number
76,Minimum Window Substring,34.6%,Hard,0.006231520398723243, https://leetcode.com/problems/minimum-window-substring
31,Next Permutation,32.6%,Medium,0.005989835219179644, https://leetcode.com/problems/next-permutation
39,Combination Sum,56.1%,Medium,0.005715934396440999, https://leetcode.com/problems/combination-sum
199,Binary Tree Right Side View,54.1%,Medium,0.0056826406650506926, https://leetcode.com/problems/binary-tree-right-side-view
206,Reverse Linked List,62.5%,Easy,0.005257021452801617, https://leetcode.com/problems/reverse-linked-list
20,Valid Parentheses,39.0%,Easy,0.005168860577665306, https://leetcode.com/problems/valid-parentheses
42,Trapping Rain Water,48.9%,Hard,0.004350670338744988, https://leetcode.com/problems/trapping-rain-water
322,Coin Change,35.5%,Medium,0.004029826126500844, https://leetcode.com/problems/coin-change
189,Rotate Array,34.7%,Easy,0.004029826126500844, https://leetcode.com/problems/rotate-array
238,Product of Array Except Self,60.1%,Medium,0.003930436424724545, https://leetcode.com/problems/product-of-array-except-self
139,Word Break,40.1%,Medium,0.003894465052690167, https://leetcode.com/problems/word-break
103,Binary Tree Zigzag Level Order Traversal,48.3%,Medium,0.003839922800048048, https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
8,String to Integer (atoi),15.4%,Medium,0.0037925521897059712, https://leetcode.com/problems/string-to-integer-atoi
198,House Robber,42.0%,Easy,0.0037576371128333645, https://leetcode.com/problems/house-robber
102,Binary Tree Level Order Traversal,54.6%,Medium,0.003639014205004082, https://leetcode.com/problems/binary-tree-level-order-traversal
141,Linked List Cycle,41.1%,Easy,0.0034937584669245472, https://leetcode.com/problems/linked-list-cycle
347,Top K Frequent Elements,61.2%,Medium,0.0033396446491217604, https://leetcode.com/problems/top-k-frequent-elements
14,Longest Common Prefix,35.4%,Easy,0.003320331762984143, https://leetcode.com/problems/longest-common-prefix
66,Plus One,43.0%,Easy,0.00326211347832938, https://leetcode.com/problems/plus-one
98,Validate Binary Search Tree,27.8%,Medium,0.002943776044013381, https://leetcode.com/problems/validate-binary-search-tree
21,Merge Two Sorted Lists,53.5%,Easy,0.0022551737583973706, https://leetcode.com/problems/merge-two-sorted-lists
15,3Sum,26.8%,Medium,0.0021990113314367685, https://leetcode.com/problems/3sum
50,Pow(x;n),30.3%,Medium,0.0014016892647828818, https://leetcode.com/problems/powx-n
1 545 ID Boundary of Binary Tree Title 38.9% Acceptance Medium Difficulty 0.09349966258159505 Frequency https://leetcode.com/problems/boundary-of-binary-tree Leetcode Question Link
2 250 545 Count Univalue Subtrees Boundary of Binary Tree 52.0% 38.9% Medium Medium 0.07975881838845024 0.09349966258159505 https://leetcode.com/problems/count-univalue-subtrees https://leetcode.com/problems/boundary-of-binary-tree
3 244 250 Shortest Word Distance II Count Univalue Subtrees 52.3% 52.0% Medium Medium 0.07622736538788424 0.07975881838845024 https://leetcode.com/problems/shortest-word-distance-ii https://leetcode.com/problems/count-univalue-subtrees
4 146 244 LRU Cache Shortest Word Distance II 33.2% 52.3% Medium Medium 0.07118067822062889 0.07622736538788424 https://leetcode.com/problems/lru-cache https://leetcode.com/problems/shortest-word-distance-ii
5 846 146 Hand of Straights LRU Cache 54.2% 33.2% Medium Medium 0.06472423940349638 0.07118067822062889 https://leetcode.com/problems/hand-of-straights https://leetcode.com/problems/lru-cache
6 968 846 Binary Tree Cameras Hand of Straights 37.5% 54.2% Hard Medium 0.05790329283155908 0.06472423940349638 https://leetcode.com/problems/binary-tree-cameras https://leetcode.com/problems/hand-of-straights
7 253 968 Meeting Rooms II Binary Tree Cameras 45.7% 37.5% Medium Hard 0.04945628059066218 0.05790329283155908 https://leetcode.com/problems/meeting-rooms-ii https://leetcode.com/problems/binary-tree-cameras
8 143 253 Reorder List Meeting Rooms II 37.1% 45.7% Medium Medium 0.04554002588608351 0.04945628059066218 https://leetcode.com/problems/reorder-list https://leetcode.com/problems/meeting-rooms-ii
9 1146 143 Snapshot Array Reorder List 37.0% 37.1% Medium Medium 0.0317991816929387 0.04554002588608351 https://leetcode.com/problems/snapshot-array https://leetcode.com/problems/reorder-list
10 284 1146 Peeking Iterator Snapshot Array 45.7% 37.0% Medium Medium 0.03110670713225487 0.0317991816929387 https://leetcode.com/problems/peeking-iterator https://leetcode.com/problems/snapshot-array
11 227 284 Basic Calculator II Peeking Iterator 36.9% 45.7% Medium Medium 0.027685557859864054 0.03110670713225487 https://leetcode.com/problems/basic-calculator-ii https://leetcode.com/problems/peeking-iterator
12 498 227 Diagonal Traverse Basic Calculator II 48.2% 36.9% Medium Medium 0.02756894104498661 0.027685557859864054 https://leetcode.com/problems/diagonal-traverse https://leetcode.com/problems/basic-calculator-ii
13 1438 498 Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit Diagonal Traverse 42.1% 48.2% Medium Medium 0.026955809988528263 0.02756894104498661 https://leetcode.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit https://leetcode.com/problems/diagonal-traverse
14 130 1438 Surrounded Regions Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit 28.1% 42.1% Medium Medium 0.02672368055211276 0.026955809988528263 https://leetcode.com/problems/surrounded-regions https://leetcode.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit
15 951 130 Flip Equivalent Binary Trees Surrounded Regions 65.8% 28.1% Medium Medium 0.025269822188076344 0.02672368055211276 https://leetcode.com/problems/flip-equivalent-binary-trees https://leetcode.com/problems/surrounded-regions
16 40 951 Combination Sum II Flip Equivalent Binary Trees 48.2% 65.8% Medium Medium 0.021424290044083395 0.025269822188076344 https://leetcode.com/problems/combination-sum-ii https://leetcode.com/problems/flip-equivalent-binary-trees
17 341 40 Flatten Nested List Iterator Combination Sum II 52.9% 48.2% Medium Medium 0.019980684690483426 0.021424290044083395 https://leetcode.com/problems/flatten-nested-list-iterator https://leetcode.com/problems/combination-sum-ii
18 787 341 Cheapest Flights Within K Stops Flatten Nested List Iterator 39.3% 52.9% Medium Medium 0.018824085245635554 0.019980684690483426 https://leetcode.com/problems/cheapest-flights-within-k-stops https://leetcode.com/problems/flatten-nested-list-iterator
19 283 787 Move Zeroes Cheapest Flights Within K Stops 57.8% 39.3% Easy Medium 0.01789853050377608 0.018824085245635554 https://leetcode.com/problems/move-zeroes https://leetcode.com/problems/cheapest-flights-within-k-stops
20 240 283 Search a 2D Matrix II Move Zeroes 43.2% 57.8% Medium Easy 0.0169815401480941 0.01789853050377608 https://leetcode.com/problems/search-a-2d-matrix-ii https://leetcode.com/problems/move-zeroes
21 658 240 Find K Closest Elements Search a 2D Matrix II 40.9% 43.2% Medium Medium 0.016611677666896175 0.0169815401480941 https://leetcode.com/problems/find-k-closest-elements https://leetcode.com/problems/search-a-2d-matrix-ii
22 51 658 N-Queens Find K Closest Elements 46.6% 40.9% Hard Medium 0.016393809775676407 0.016611677666896175 https://leetcode.com/problems/n-queens https://leetcode.com/problems/find-k-closest-elements
23 297 51 Serialize and Deserialize Binary Tree N-Queens 47.5% 46.6% Hard Hard 0.01585377577217724 0.016393809775676407 https://leetcode.com/problems/serialize-and-deserialize-binary-tree https://leetcode.com/problems/n-queens
24 215 297 Kth Largest Element in an Array Serialize and Deserialize Binary Tree 55.4% 47.5% Medium Hard 0.015519225147600912 0.01585377577217724 https://leetcode.com/problems/kth-largest-element-in-an-array https://leetcode.com/problems/serialize-and-deserialize-binary-tree
25 153 215 Find Minimum in Rotated Sorted Array Kth Largest Element in an Array 45.1% 55.4% Medium Medium 0.014939586916186732 0.015519225147600912 https://leetcode.com/problems/find-minimum-in-rotated-sorted-array https://leetcode.com/problems/kth-largest-element-in-an-array
26 443 153 String Compression Find Minimum in Rotated Sorted Array 41.3% 45.1% Easy Medium 0.01390843004613198 0.014939586916186732 https://leetcode.com/problems/string-compression https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
27 703 443 Kth Largest Element in a Stream String Compression 49.7% 41.3% Easy Easy 0.013898764390814973 0.01390843004613198 https://leetcode.com/problems/kth-largest-element-in-a-stream https://leetcode.com/problems/string-compression
28 138 703 Copy List with Random Pointer Kth Largest Element in a Stream 36.4% 49.7% Medium Easy 0.013876263355766411 0.013898764390814973 https://leetcode.com/problems/copy-list-with-random-pointer https://leetcode.com/problems/kth-largest-element-in-a-stream
29 767 138 Reorganize String Copy List with Random Pointer 48.7% 36.4% Medium Medium 0.01329806830463147 0.013876263355766411 https://leetcode.com/problems/reorganize-string https://leetcode.com/problems/copy-list-with-random-pointer
30 665 767 Non-decreasing Array Reorganize String 19.5% 48.7% Easy Medium 0.013016779950191773 0.01329806830463147 https://leetcode.com/problems/non-decreasing-array https://leetcode.com/problems/reorganize-string
31 33 665 Search in Rotated Sorted Array Non-decreasing Array 34.5% 19.5% Medium Easy 0.012857779194289386 0.013016779950191773 https://leetcode.com/problems/search-in-rotated-sorted-array https://leetcode.com/problems/non-decreasing-array
32 129 33 Sum Root to Leaf Numbers Search in Rotated Sorted Array 49.1% 34.5% Medium Medium 0.012739025777429757 0.012857779194289386 https://leetcode.com/problems/sum-root-to-leaf-numbers https://leetcode.com/problems/search-in-rotated-sorted-array
33 213 129 House Robber II Sum Root to Leaf Numbers 36.5% 49.1% Medium Medium 0.012654392210497564 0.012739025777429757 https://leetcode.com/problems/house-robber-ii https://leetcode.com/problems/sum-root-to-leaf-numbers
34 445 213 Add Two Numbers II House Robber II 54.5% 36.5% Medium Medium 0.01233061245747872 0.012654392210497564 https://leetcode.com/problems/add-two-numbers-ii https://leetcode.com/problems/house-robber-ii
35 547 445 Friend Circles Add Two Numbers II 58.6% 54.5% Medium Medium 0.012228828639434596 0.01233061245747872 https://leetcode.com/problems/friend-circles https://leetcode.com/problems/add-two-numbers-ii
36 300 547 Longest Increasing Subsequence Friend Circles 42.6% 58.6% Medium Medium 0.011806512586989004 0.012228828639434596 https://leetcode.com/problems/longest-increasing-subsequence https://leetcode.com/problems/friend-circles
37 200 300 Number of Islands Longest Increasing Subsequence 46.8% 42.6% Medium Medium 0.011509262420590827 0.011806512586989004 https://leetcode.com/problems/number-of-islands https://leetcode.com/problems/longest-increasing-subsequence
38 785 200 Is Graph Bipartite? Number of Islands 47.5% 46.8% Medium Medium 0.011236073266925854 0.011509262420590827 https://leetcode.com/problems/is-graph-bipartite https://leetcode.com/problems/number-of-islands
39 160 785 Intersection of Two Linked Lists Is Graph Bipartite? 40.6% 47.5% Easy Medium 0.010994491398666248 0.011236073266925854 https://leetcode.com/problems/intersection-of-two-linked-lists https://leetcode.com/problems/is-graph-bipartite
40 662 160 Maximum Width of Binary Tree Intersection of Two Linked Lists 41.0% 40.6% Medium Easy 0.010790501245113902 0.010994491398666248 https://leetcode.com/problems/maximum-width-of-binary-tree https://leetcode.com/problems/intersection-of-two-linked-lists
41 17 662 Letter Combinations of a Phone Number Maximum Width of Binary Tree 46.8% 41.0% Medium Medium 0.00987716546167603 0.010790501245113902 https://leetcode.com/problems/letter-combinations-of-a-phone-number https://leetcode.com/problems/maximum-width-of-binary-tree
42 3 17 Longest Substring Without Repeating Characters Letter Combinations of a Phone Number 30.4% 46.8% Medium Medium 0.009683242444739549 0.00987716546167603 https://leetcode.com/problems/longest-substring-without-repeating-characters https://leetcode.com/problems/letter-combinations-of-a-phone-number
43 560 3 Subarray Sum Equals K Longest Substring Without Repeating Characters 43.9% 30.4% Medium Medium 0.009603146783199741 0.009683242444739549 https://leetcode.com/problems/subarray-sum-equals-k https://leetcode.com/problems/longest-substring-without-repeating-characters
44 46 560 Permutations Subarray Sum Equals K 63.5% 43.9% Medium Medium 0.009461803137288448 0.009603146783199741 https://leetcode.com/problems/permutations https://leetcode.com/problems/subarray-sum-equals-k
45 23 46 Merge k Sorted Lists Permutations 40.2% 63.5% Hard Medium 0.009092808657599025 0.009461803137288448 https://leetcode.com/problems/merge-k-sorted-lists https://leetcode.com/problems/permutations
46 5 23 Longest Palindromic Substring Merge k Sorted Lists 29.5% 40.2% Medium Hard 0.009086325220960808 0.009092808657599025 https://leetcode.com/problems/longest-palindromic-substring https://leetcode.com/problems/merge-k-sorted-lists
47 977 5 Squares of a Sorted Array Longest Palindromic Substring 72.1% 29.5% Easy Medium 0.008733679968754604 0.009086325220960808 https://leetcode.com/problems/squares-of-a-sorted-array https://leetcode.com/problems/longest-palindromic-substring
48 394 977 Decode String Squares of a Sorted Array 50.0% 72.1% Medium Easy 0.008166644000272283 0.008733679968754604 https://leetcode.com/problems/decode-string https://leetcode.com/problems/squares-of-a-sorted-array
49 56 394 Merge Intervals Decode String 39.3% 50.0% Medium Medium 0.007796972706004796 0.008166644000272283 https://leetcode.com/problems/merge-intervals https://leetcode.com/problems/decode-string
50 994 56 Rotting Oranges Merge Intervals 49.2% 39.3% Medium Medium 0.007630712341163886 0.007796972706004796 https://leetcode.com/problems/rotting-oranges https://leetcode.com/problems/merge-intervals
51 1 994 Two Sum Rotting Oranges 45.6% 49.2% Easy Medium 0.0073613942765888805 0.007630712341163886 https://leetcode.com/problems/two-sum https://leetcode.com/problems/rotting-oranges
52 41 1 First Missing Positive Two Sum 32.0% 45.6% Hard Easy 0.0064113058208121855 0.0073613942765888805 https://leetcode.com/problems/first-missing-positive https://leetcode.com/problems/two-sum
53 83 41 Remove Duplicates from Sorted List First Missing Positive 45.4% 32.0% Easy Hard 0.006353261522609498 0.0064113058208121855 https://leetcode.com/problems/remove-duplicates-from-sorted-list https://leetcode.com/problems/first-missing-positive
54 202 83 Happy Number Remove Duplicates from Sorted List 50.4% 45.4% Easy Easy 0.006266666286010046 0.006353261522609498 https://leetcode.com/problems/happy-number https://leetcode.com/problems/remove-duplicates-from-sorted-list
55 76 202 Minimum Window Substring Happy Number 34.6% 50.4% Hard Easy 0.006231520398723243 0.006266666286010046 https://leetcode.com/problems/minimum-window-substring https://leetcode.com/problems/happy-number
56 31 76 Next Permutation Minimum Window Substring 32.6% 34.6% Medium Hard 0.005989835219179644 0.006231520398723243 https://leetcode.com/problems/next-permutation https://leetcode.com/problems/minimum-window-substring
57 39 31 Combination Sum Next Permutation 56.1% 32.6% Medium Medium 0.005715934396440999 0.005989835219179644 https://leetcode.com/problems/combination-sum https://leetcode.com/problems/next-permutation
58 199 39 Binary Tree Right Side View Combination Sum 54.1% 56.1% Medium Medium 0.0056826406650506926 0.005715934396440999 https://leetcode.com/problems/binary-tree-right-side-view https://leetcode.com/problems/combination-sum
59 206 199 Reverse Linked List Binary Tree Right Side View 62.5% 54.1% Easy Medium 0.005257021452801617 0.0056826406650506926 https://leetcode.com/problems/reverse-linked-list https://leetcode.com/problems/binary-tree-right-side-view
60 20 206 Valid Parentheses Reverse Linked List 39.0% 62.5% Easy Easy 0.005168860577665306 0.005257021452801617 https://leetcode.com/problems/valid-parentheses https://leetcode.com/problems/reverse-linked-list
61 42 20 Trapping Rain Water Valid Parentheses 48.9% 39.0% Hard Easy 0.004350670338744988 0.005168860577665306 https://leetcode.com/problems/trapping-rain-water https://leetcode.com/problems/valid-parentheses
62 322 42 Coin Change Trapping Rain Water 35.5% 48.9% Medium Hard 0.004029826126500844 0.004350670338744988 https://leetcode.com/problems/coin-change https://leetcode.com/problems/trapping-rain-water
63 189 322 Rotate Array Coin Change 34.7% 35.5% Easy Medium 0.004029826126500844 0.004029826126500844 https://leetcode.com/problems/rotate-array https://leetcode.com/problems/coin-change
64 238 189 Product of Array Except Self Rotate Array 60.1% 34.7% Medium Easy 0.003930436424724545 0.004029826126500844 https://leetcode.com/problems/product-of-array-except-self https://leetcode.com/problems/rotate-array
65 139 238 Word Break Product of Array Except Self 40.1% 60.1% Medium Medium 0.003894465052690167 0.003930436424724545 https://leetcode.com/problems/word-break https://leetcode.com/problems/product-of-array-except-self
66 103 139 Binary Tree Zigzag Level Order Traversal Word Break 48.3% 40.1% Medium Medium 0.003839922800048048 0.003894465052690167 https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal https://leetcode.com/problems/word-break
67 8 103 String to Integer (atoi) Binary Tree Zigzag Level Order Traversal 15.4% 48.3% Medium Medium 0.0037925521897059712 0.003839922800048048 https://leetcode.com/problems/string-to-integer-atoi https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
68 198 8 House Robber String to Integer (atoi) 42.0% 15.4% Easy Medium 0.0037576371128333645 0.0037925521897059712 https://leetcode.com/problems/house-robber https://leetcode.com/problems/string-to-integer-atoi
69 102 198 Binary Tree Level Order Traversal House Robber 54.6% 42.0% Medium Easy 0.003639014205004082 0.0037576371128333645 https://leetcode.com/problems/binary-tree-level-order-traversal https://leetcode.com/problems/house-robber
70 141 102 Linked List Cycle Binary Tree Level Order Traversal 41.1% 54.6% Easy Medium 0.0034937584669245472 0.003639014205004082 https://leetcode.com/problems/linked-list-cycle https://leetcode.com/problems/binary-tree-level-order-traversal
71 347 141 Top K Frequent Elements Linked List Cycle 61.2% 41.1% Medium Easy 0.0033396446491217604 0.0034937584669245472 https://leetcode.com/problems/top-k-frequent-elements https://leetcode.com/problems/linked-list-cycle
72 14 347 Longest Common Prefix Top K Frequent Elements 35.4% 61.2% Easy Medium 0.003320331762984143 0.0033396446491217604 https://leetcode.com/problems/longest-common-prefix https://leetcode.com/problems/top-k-frequent-elements
73 66 14 Plus One Longest Common Prefix 43.0% 35.4% Easy Easy 0.00326211347832938 0.003320331762984143 https://leetcode.com/problems/plus-one https://leetcode.com/problems/longest-common-prefix
74 98 66 Validate Binary Search Tree Plus One 27.8% 43.0% Medium Easy 0.002943776044013381 0.00326211347832938 https://leetcode.com/problems/validate-binary-search-tree https://leetcode.com/problems/plus-one
75 21 98 Merge Two Sorted Lists Validate Binary Search Tree 53.5% 27.8% Easy Medium 0.0022551737583973706 0.002943776044013381 https://leetcode.com/problems/merge-two-sorted-lists https://leetcode.com/problems/validate-binary-search-tree
76 15 21 3Sum Merge Two Sorted Lists 26.8% 53.5% Medium Easy 0.0021990113314367685 0.0022551737583973706 https://leetcode.com/problems/3sum https://leetcode.com/problems/merge-two-sorted-lists
77 50 15 Pow(x;n) 3Sum 30.3% 26.8% Medium Medium 0.0014016892647828818 0.0021990113314367685 https://leetcode.com/problems/powx-n https://leetcode.com/problems/3sum
78 50 Pow(x;n) 30.3% Medium 0.0014016892647828818 https://leetcode.com/problems/powx-n