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Arrays

271 stations · 111h

Traversal, in-place tricks, Kadane, and the patterns every other topic builds on. 271 interview problems explained by codestorywithMIK (111h of video), grouped into 9 patterns such as Prefix Sum, Kadane, Two Pointers.

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problems by zone (pattern)
  • Prefix Sum36
  • Kadane2
  • Two Pointers24
  • Sliding Window (variable)12
  • Hashing48
  • Matrix74
  • Intervals7
  • Sorting & Counting65
  • Simulation & Implementation79

  1. Prefix Sum

    0 of 36 passed
  2. Find Pivot IndexLC 724 · 15:06
    EasyGoogle · Amazon · +13 more companiesLeetCode ↗ (opens in a new tab)
  3. Continuous Subarray SumLC 523 · 21:41
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  4. Minimum Average DifferenceLC 2256 · 21:47
    MediumAmazon · MetaLeetCode ↗ (opens in a new tab)
  5. Longest Subsequence With Limited Sum : Explanation ➕ Live Coding👩🏻‍💻🧑🏻‍💻🤯😱LC 2389 · 33:11
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  6. Subarray Sums Divisible by KLC 974 · 35:53
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  7. Minimum Penalty for a ShopLC 2483 · 55:28
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  8. Minimum Amount of Time to Collect GarbageLC 2391 · 19:59
    MediumGoogle · MicrosoftLeetCode ↗ (opens in a new tab)
  9. Sum of Absolute Differences in a Sorted ArrayLC 1685 · 31:12
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  10. Number of Submatrices That Sum to TargetLC 1074 · 56:53
    MediumGoogle · Amazon · +41 more companiesLeetCode ↗ (opens in a new tab)
  11. Product of Array Except SelfLC 238 · 33:50
    MediumGoogle · Amazon · +33 more companiesLeetCode ↗ (opens in a new tab)
  12. Contiguous ArrayLC 525 · 21:19
    MediumGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  13. Count Number of Nice SubarraysLC 1248 · 32:49
    MediumGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  14. Minimum Number of K Consecutive Bit FlipsLC 995 · 1:03:24
    HardGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  15. Find the Student that Will Replace the ChalkLC 1894 · 19:14
    MediumGoogleLeetCode ↗ (opens in a new tab)
  16. My Calendar IILC 731 · 32:41
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  17. Make Sum Divisible by PLC 1590 · 27:26
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  18. Special Array IILC 3152 · 1:07:18
    MediumAmazon · Microsoft · +2 more companiesLeetCode ↗ (opens in a new tab)
  19. Count Vowel Strings in RangesLC 2559 · 15:57
    MediumGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  20. Number of Ways to Split ArrayLC 2270 · 12:50
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  21. Find the Prefix Common Array of Two ArraysLC 2657 · 39:12
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  22. Product of the Last K NumbersLC 1352 · 28:12
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  23. Number of Sub-arrays With Odd SumLC 1524 · 31:46
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  24. Count of Interesting SubarraysLC 2845 · 38:30
    MediumGoogle · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  25. Range Product Queries of PowersLC 2438 · 19:17
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  26. Find the Minimum Amount of Time to Brew PotionsLC 3494 · 46:41
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  27. Adjacent Increasing Subarrays Detection IILC 3350 · 15:51
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  28. Largest Magic SquareLC 1895 · 48:37
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  29. Maximum Side Length of a Square with Sum Less than or Equal to ThresholdLC 1292 · 1:01:20
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  30. Count Submatrices with Top-Left Element and Sum Less Than kLC 3070 · 27:26
    MediumAmazon · MicrosoftLeetCode ↗ (opens in a new tab)
  31. Sum of DistancesLC 2615 · 32:20
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  32. Count Subarrays With Majority Element I and IILC 3737 · 1:00:05
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  33. Concatenate Non-Zero Digits and Multiply by Sum IILC 3756 · 50:34
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  34. Make Array Elements Equal to ZeroLC 3354 · 30:16
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  35. Count Partitions with Even Sum DifferenceLC 3432 · 19:55
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  36. XOR After Range Multiplication Queries ILC 3653 · 8:27
    MediumAmazon · InfosysLeetCode ↗ (opens in a new tab)
  37. Smallest Stable Index I & IILC 3903 · 16:58
    EasyLeetCode ↗ (opens in a new tab)

  38. Kadane

    0 of 2 passed
  39. Maximum Absolute Sum of Any SubarrayLC 1749 · 30:50
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  40. Maximum Subarray Sum With Length Divisible by KLC 3381 · 31:35
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)

  41. Two Pointers

    0 of 24 passed
  42. Two Sum II - Input Array Is Sorted : Explanation ➕ Live Coding 🧑🏻‍💻 (In Hinglish)LC 167 · 10:13
    MediumGoogle · Amazon · +13 more companiesLeetCode ↗ (opens in a new tab)
  43. 3 SUMLC 15 · 35:43
    MediumGoogle · Amazon · +47 more companiesLeetCode ↗ (opens in a new tab)
  44. Trapping Rain WaterLC 42 · 20:00
    HardGoogle · Amazon · +70 more companiesLeetCode ↗ (opens in a new tab)
  45. 3Sum Closest - (Meta, Amazon, Microsoft, Oracle)➕Live Coding 🧑🏻‍💻LC 16 · 14:31
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  46. Next PermutationLC 31 · 25:45
    MediumGoogle · Amazon · +29 more companiesLeetCode ↗ (opens in a new tab)
  47. Container With Most WaterLC 11 · 18:38
    MediumGoogle · Amazon · +52 more companiesLeetCode ↗ (opens in a new tab)
  48. Find the Duplicate NumberLC 287 · 26:47
    MediumGoogle · Amazon · +20 more companiesLeetCode ↗ (opens in a new tab)
  49. Rearrange Array Elements by SignLC 2149 · 17:51
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  50. Divide Players Into Teams of Equal SkillLC 2491 · 26:49
    MediumAmazon · Microsoft · +3 more companiesLeetCode ↗ (opens in a new tab)
  51. Rotating the BoxLC 1861 · 34:16
    MediumGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  52. Partition Array According to Given PivotLC 2161 · 29:52
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  53. Valid Triangle NumberLC 611 · 29:32
    MediumGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  54. Number of Smooth Descent Periods of a StockLC 2110 · 10:21
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  55. Earliest Finish Time for Land and Water Rides I and IILC 3633 · 33:28
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  56. Assign CookiesLC 455 · 14:49
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  57. Squares of a Sorted ArrayLC 977 · 6:25
    EasyGoogle · Amazon · +15 more companiesLeetCode ↗ (opens in a new tab)
  58. Minimum Common ValueLC 2540 · 11:28
    EasyGoogle · Microsoft · +1 more companiesLeetCode ↗ (opens in a new tab)
  59. Intersection of Two ArraysLC 349 · 21:08
    EasyGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  60. Largest Positive Integer That Exists With Its NegativeLC 2441 · 28:05
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  61. Intersection of Two Arrays IILC 350 · 14:10
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  62. Check If N and Its Double ExistLC 1346 · 14:57
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  63. Apply Operations to an ArrayLC 2460 · 18:50
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  64. Find All K-Distant Indices in an ArrayLC 2200 · 20:44
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  65. Flip Square Submatrix VerticallyLC 3643 · 7:09
    EasyGoogle · MetaLeetCode ↗ (opens in a new tab)

  66. Sliding Window (variable)

    0 of 12 passed
  67. Contains Duplicate II -(Airbnb, Palantir Technologies): Explanation ➕ Live Coding 🧑🏻‍💻LC 219 · 11:10
    EasyGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  68. K Radius Subarray AveragesLC 2090 · 24:45
    MediumGoogle · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  69. Minimum Number of Operations to Make Array ContinuousLC 2009 · 35:18
    HardGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  70. Count Number of Nice SubarraysLC 1248 · 32:49
    MediumGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  71. Minimum Number of K Consecutive Bit FlipsLC 995 · 1:03:24
    HardGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  72. Longest Subarray With Maximum Bitwise ANDLC 2419 · 14:31
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  73. Shortest Subarray to be Removed to Make Array SortedLC 1574 · 34:17
    MediumGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  74. Maximum Beauty of an Array After Applying OperationLC 2779 · 58:36
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  75. Number of Smooth Descent Periods of a StockLC 2110 · 10:21
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  76. Longest Harmonious SubsequenceLC 594 · 22:35
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  77. Minimum Difference Between Highest and Lowest of K ScoresLC 1984 · 11:37
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  78. Minimum Absolute DifferenceLC 1200 · 8:49
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)

  79. Hashing

    0 of 48 passed
  80. Two SumLC 1 · 12:24
    EasyGoogle · Amazon · +113 more companiesLeetCode ↗ (opens in a new tab)
  81. Find Original Array From Doubled ArrayLC 2007 · 14:55
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  82. Contains Duplicate II -(Airbnb, Palantir Technologies): Explanation ➕ Live Coding 🧑🏻‍💻LC 219 · 11:10
    EasyGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  83. Set MismatchLC 645 · 19:16
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  84. Continuous Subarray SumLC 523 · 21:41
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  85. Valid SudokuLC 36 · 41:14
    MediumGoogle · Amazon · +22 more companiesLeetCode ↗ (opens in a new tab)
  86. Subarray Sums Divisible by KLC 974 · 35:53
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  87. Find the Town JudgeLC 997 · 10:43
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  88. Jump Game IVLC 1345 · 21:04
    HardGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  89. Group the People Given the Group Size They Belong ToLC 1282 · 14:46
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  90. Minimum Operations to Reduce X to ZeroLC 1658 · 31:59
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  91. Majority Element ILC 229 · 31:50
    EasyGoogle · Amazon · +22 more companiesLeetCode ↗ (opens in a new tab)
  92. Minimum Number of Operations to Make Array ContinuousLC 2009 · 35:18
    HardGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  93. Number of Submatrices That Sum to TargetLC 1074 · 56:53
    MediumGoogle · Amazon · +41 more companiesLeetCode ↗ (opens in a new tab)
  94. Meeting Rooms IIILC 2402 · 1:00:03
    HardGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  95. Contiguous ArrayLC 525 · 21:19
    MediumGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  96. Find All Duplicates in an ArrayLC 442 · 12:11
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  97. First Missing PositiveLC 41 · 33:17
    HardGoogle · Amazon · +28 more companiesLeetCode ↗ (opens in a new tab)
  98. Count Number of Nice SubarraysLC 1248 · 32:49
    MediumGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  99. Regions Cut By SlashesLC 959 · 42:56
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  100. Make Sum Divisible by PLC 1590 · 27:26
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  101. Divide Players Into Teams of Equal SkillLC 2491 · 26:49
    MediumAmazon · Microsoft · +3 more companiesLeetCode ↗ (opens in a new tab)
  102. The Number of the Smallest Unoccupied ChairLC 1942 · 32:23
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  103. Longest Square Streak in an ArrayLC 2501 · 24:47
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  104. Flip Columns For Maximum Number of Equal RowsLC 1072 · 30:05
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  105. First Completely Painted Row or ColumnLC 2661 · 39:47
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  106. Count Servers that CommunicateLC 1267 · 44:20
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  107. Tuple with Same ProductLC 1726 · 57:29
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  108. Max Sum of a Pair With Equal Sum of DigitsLC 2342 · 25:31
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  109. Count of Interesting SubarraysLC 2845 · 38:30
    MediumGoogle · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  110. Maximum Frequency of an Element After Performing Operations ILC 3346 · 37:48
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  111. Count Submatrices With Equal Frequency of X and YLC 3212 · 16:48
    MediumAmazon · MicrosoftLeetCode ↗ (opens in a new tab)
  112. Sum of DistancesLC 2615 · 32:20
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  113. Count Subarrays With Majority Element I and IILC 3737 · 1:00:05
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  114. Minimum Moves to Clean the ClassroomLC 3568 · 1:06:42
    MediumBloombergLeetCode ↗ (opens in a new tab)
  115. Count Elements With Maximum FrequencyLC 3005 · 12:50
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  116. Minimum Common ValueLC 2540 · 11:28
    EasyGoogle · Microsoft · +1 more companiesLeetCode ↗ (opens in a new tab)
  117. Intersection of Two ArraysLC 349 · 21:08
    EasyGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  118. Largest Positive Integer That Exists With Its NegativeLC 2441 · 28:05
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  119. Find Common CharactersLC 1002 · 13:12
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  120. Intersection of Two Arrays IILC 350 · 14:10
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  121. Make Two Arrays Equal by Reversing SubarraysLC 1460 · 12:03
    EasyMeta · BloombergLeetCode ↗ (opens in a new tab)
  122. Check If N and Its Double ExistLC 1346 · 14:57
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  123. Divide Array Into Equal PairsLC 2206 · 19:11
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  124. Maximum Difference Between Even and Odd Frequency ILC 3442 · 6:30
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  125. Longest Harmonious SubsequenceLC 594 · 22:35
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  126. Check if Array is GoodLC 2784 · 30:42
    EasyGoogle · Microsoft · +1 more companiesLeetCode ↗ (opens in a new tab)
  127. Maximum Count of Positive Integer and Negative IntegerLC 2529 · 33:39
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)

  128. Matrix

    0 of 74 passed
  129. Rotate ImageLC 48 · 9:31
    MediumGoogle · Amazon · +32 more companiesLeetCode ↗ (opens in a new tab)
  130. Spiral MatrixLC 54 · 26:53
    MediumGoogle · Amazon · +47 more companiesLeetCode ↗ (opens in a new tab)
  131. Sort the Matrix DiagonallyLC 1329 · 24:02
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  132. Diagonal TraverseLC 498 · 13:04
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  133. Image OverlapLC 835 · 28:56
    MediumGoogleLeetCode ↗ (opens in a new tab)
  134. Shortest Path in a Grid with Obstacles Elimination -(Google) : Explanation ➕ Live CodingLC 1293 · 26:47
    HardGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  135. Toeplitz Matrix -(Google, Meta, Apple) : Explanation ➕ Live CodingLC 766 · 9:48
    EasyGoogle · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  136. Where Will the Ball Fall -(Amazon) : Explanation ➕ Live CodingLC 1706 · 20:24
    MediumGoogleLeetCode ↗ (opens in a new tab)
  137. Valid SudokuLC 36 · 41:14
    MediumGoogle · Amazon · +22 more companiesLeetCode ↗ (opens in a new tab)
  138. Snakes and LaddersLC 909 · 44:24
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  139. Number of Closed IslandsLC 1254 · 18:56
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  140. Number of Enclaves - (Leetcode - 1020) - (AMAZON) : Explanation ➕ Live Coding 🧑🏻‍💻👩🏻‍💻LC 1020 · 15:35
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  141. Spiral Matrix IILC 59 · 18:01
    MediumGoogle · Amazon · +9 more companiesLeetCode ↗ (opens in a new tab)
  142. Shortest BridgeLC 934 · 26:49
    MediumGoogle · Amazon · +15 more companiesLeetCode ↗ (opens in a new tab)
  143. Count Negative Numbers in a Sorted MatrixLC 1351 · 30:54
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  144. Shortest Path to Get All KeysLC 864 · 31:32
    HardGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  145. 01 MatrixLC 542 · 18:59
    MediumGoogle · Amazon · +9 more companiesLeetCode ↗ (opens in a new tab)
  146. The K Weakest Rows in a MatrixLC 1337 · 29:08
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  147. Largest Submatrix With RearrangementsLC 1727 · 52:35
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  148. Difference Between Ones and Zeros in Row and ColumnLC 2482 · 12:46
    MediumAmazonLeetCode ↗ (opens in a new tab)
  149. Image SmootherLC 661 · 38:20
    EasyAmazon · Meta · +4 more companiesLeetCode ↗ (opens in a new tab)
  150. Anti Diagonal Traversal of Matrix12:52
    LeetCode ↗ (opens in a new tab)
  151. Convert an Array Into a 2D Array With ConditionsLC 2610 · 15:45
    MediumGoogleLeetCode ↗ (opens in a new tab)
  152. Island PerimeterLC 463 · 45:34
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  153. Number of IslandsLC 200 · 17:49
    MediumGoogle · Amazon · +79 more companiesLeetCode ↗ (opens in a new tab)
  154. Find All Groups of FarmlandLC 1992 · 32:39
    MediumGoogle · CitrixLeetCode ↗ (opens in a new tab)
  155. Find Valid Matrix Given Row and Column SumsLC 1605 · 19:18
    MediumGoogle · Squarepoint CapitalLeetCode ↗ (opens in a new tab)
  156. Spiral Matrix IIILC 885 · 30:57
    MediumGoogle · Meta · +3 more companiesLeetCode ↗ (opens in a new tab)
  157. Magic Squares In GridLC 840 · 26:09
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  158. Regions Cut By SlashesLC 959 · 42:56
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  159. Minimum Number of Days to Disconnect IslandLC 1568 · 24:20
    HardGoogleLeetCode ↗ (opens in a new tab)
  160. Count Sub IslandsLC 1905 · 29:15
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  161. Spiral Matrix IVLC 2326 · 24:17
    MediumGoogle · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  162. Maximum Number of Moves in a GridLC 2684 · 15:53
    MediumGoogle · AccentureLeetCode ↗ (opens in a new tab)
  163. Count Unguarded Cells in the GridLC 2257 · 14:58
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  164. Flip Columns For Maximum Number of Equal RowsLC 1072 · 30:05
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  165. Rotating the BoxLC 1861 · 34:16
    MediumGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  166. Maximum Matrix SumLC 1975 · 18:33
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  167. Sliding PuzzleLC 773 · 34:24
    HardGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  168. First Completely Painted Row or ColumnLC 2661 · 39:47
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  169. Grid GameLC 2017 · 35:32
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  170. Count Servers that CommunicateLC 1267 · 44:20
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  171. Check if Grid can be Cut into SectionsLC 3394 · 43:18
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  172. Maximum Number of Points From Grid QueriesLC 2503 · 47:49
    HardGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  173. Set Matrix ZeroesLC 73 · 36:44
    MediumGoogle · Amazon · +18 more companiesLeetCode ↗ (opens in a new tab)
  174. Count Submatrices With All OnesLC 1504 · 29:31
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  175. Find the Minimum Area to Cover All Ones ILC 3195 · 12:11
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  176. Find the Minimum Area to Cover All Ones IILC 3197 · 56:26
    HardGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  177. Sort Matrix by DiagonalsLC 3446 · 38:17
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  178. Pacific Atlantic Water FlowLC 417 · 37:21
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  179. Maximize Area of Square Hole in GridLC 2943 · 27:54
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  180. Largest Magic SquareLC 1895 · 48:37
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  181. Maximum Side Length of a Square with Sum Less than or Equal to ThresholdLC 1292 · 1:01:20
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  182. Minimum Swaps to Arrange a Binary GridLC 1536 · 23:02
    MediumAmazon · BloombergLeetCode ↗ (opens in a new tab)
  183. Get Biggest Three Rhombus Sums in a GridLC 1878 · 1:02:44
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  184. Count Submatrices with Top-Left Element and Sum Less Than kLC 3070 · 27:26
    MediumAmazon · MicrosoftLeetCode ↗ (opens in a new tab)
  185. Minimum Absolute Difference in Sliding SubmatrixLC 3567 · 16:49
    MediumGoogle · AmazonLeetCode ↗ (opens in a new tab)
  186. Construct Product MatrixLC 2906 · 17:57
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  187. Equal Sum Grid Partition ILC 3546 · 19:48
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  188. Equal Sum Grid Partition IILC 3548 · 57:23
    HardGoogle · MicrosoftLeetCode ↗ (opens in a new tab)
  189. Cyclically Rotating a GridLC 1914 · 20:56
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  190. Rotate ArrayLC 189 · 20:18
    MediumGoogle · Amazon · +25 more companiesLeetCode ↗ (opens in a new tab)
  191. Minimum Cost Homecoming of a Robot in a GridLC 2087 · 25:27
    MediumMicrosoft · Goldman Sachs · +2 more companiesLeetCode ↗ (opens in a new tab)
  192. Minimum Moves to Clean the ClassroomLC 3568 · 1:06:42
    MediumBloombergLeetCode ↗ (opens in a new tab)
  193. Count Islands With Total Value Divisible by KLC 3619 · 19:06
    MediumGoogle · IntuitLeetCode ↗ (opens in a new tab)
  194. Transpose MatrixLC 867 · 10:11
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  195. Special Positions in a Binary MatrixLC 1582 · 16:10
    EasyGoogle · AmazonLeetCode ↗ (opens in a new tab)
  196. Largest Local Values in a MatrixLC 2373 · 13:00
    EasyGoogle · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  197. Lucky Numbers in a MatrixLC 1380 · 23:55
    EasyAmazon · Oracle · +1 more companiesLeetCode ↗ (opens in a new tab)
  198. Convert 1D Array Into 2D ArrayLC 2022 · 13:15
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  199. Merge Two 2D Arrays by Summing ValuesLC 2570 · 20:52
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  200. Flip Square Submatrix VerticallyLC 3643 · 7:09
    EasyGoogle · MetaLeetCode ↗ (opens in a new tab)
  201. Determine Whether Matrix Can Be Obtained By RotationLC 1886 · 20:15
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  202. Matrix Similarity After Cyclic ShiftsLC 2946 · 24:29
    LeetCode ↗ (opens in a new tab)

  203. Intervals

    0 of 7 passed
  204. Insert IntervalLC 57 · 24:35
    MediumGoogle · Amazon · +14 more companiesLeetCode ↗ (opens in a new tab)
  205. Data Stream as Disjoint Intervals - (AMAZON) : Explanation ➕ Live CodingLC 352 · 38:19
    HardGoogle · AmazonLeetCode ↗ (opens in a new tab)
  206. Non-overlapping IntervalsLC 435 · 37:03 · LeetCode Premium
    EasyGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  207. Divide Intervals Into Minimum Number of GroupsLC 2406 · 20:58
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  208. Two Best Non-Overlapping EventsLC 2054 · 27:53
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  209. Check if Grid can be Cut into SectionsLC 3394 · 43:18
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  210. Maximum Sum of Two Non-Overlapping SubarraysLC 1031 · 46:34
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)

  211. Sorting & Counting

    0 of 65 passed
  212. 3 SUMLC 15 · 35:43
    MediumGoogle · Amazon · +47 more companiesLeetCode ↗ (opens in a new tab)
  213. 3Sum Closest - (Meta, Amazon, Microsoft, Oracle)➕Live Coding 🧑🏻‍💻LC 16 · 14:31
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  214. Group AnagramsLC 49 · 11:36
    MediumGoogle · Amazon · +77 more companiesLeetCode ↗ (opens in a new tab)
  215. Group AnagramsLC 49 · 14:24
    MediumGoogle · Amazon · +77 more companiesLeetCode ↗ (opens in a new tab)
  216. Sort the Matrix DiagonallyLC 1329 · 24:02
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  217. Sort ColorsLC 75 · 14:08
    MediumGoogle · Amazon · +35 more companiesLeetCode ↗ (opens in a new tab)
  218. Find Original Array From Doubled ArrayLC 2007 · 14:55
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  219. Largest Perimeter TriangleLC 976 · 11:06
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  220. Set MismatchLC 645 · 19:16
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  221. Longest Subsequence With Limited Sum : Explanation ➕ Live Coding👩🏻‍💻🧑🏻‍💻🤯😱LC 2389 · 33:11
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  222. Minimum Number of Arrows to Burst BalloonsLC 452 · 23:40
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  223. Put Marbles in BagsLC 2551 · 26:36
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  224. Kth Largest Element in an ArrayLC 215 · 29:38
    MediumGoogle · Amazon · +39 more companiesLeetCode ↗ (opens in a new tab)
  225. The K Weakest Rows in a MatrixLC 1337 · 29:08
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  226. Sort Array By ParityLC 905 · 13:14
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  227. Majority Element ILC 229 · 31:50
    EasyGoogle · Amazon · +22 more companiesLeetCode ↗ (opens in a new tab)
  228. Reduction Operations to Make the Array Elements EqualLC 1887 · 13:54
    MediumMicrosoftLeetCode ↗ (opens in a new tab)
  229. Diagonal Traverse IILC 1424 · 31:46
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  230. Arithmetic SubarraysLC 1630 · 21:45
    MediumGoogleLeetCode ↗ (opens in a new tab)
  231. Largest Submatrix With RearrangementsLC 1727 · 52:35
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  232. Widest Vertical Area Between Two Points Containing No PointsLC 1637 · 9:02
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  233. Meeting Rooms IIILC 2402 · 1:00:03
    HardGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  234. Find All Duplicates in an ArrayLC 442 · 12:11
    MediumGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  235. Minimum Difference Between Largest and Smallest Value in Three MovesLC 1509 · 31:36
    MediumGoogle · AmazonLeetCode ↗ (opens in a new tab)
  236. Minimum Time DifferenceLC 539 · 24:01
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  237. Divide Players Into Teams of Equal SkillLC 2491 · 26:49
    MediumAmazon · Microsoft · +3 more companiesLeetCode ↗ (opens in a new tab)
  238. Longest Square Streak in an ArrayLC 2501 · 24:47
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  239. Find if Array Can Be SortedLC 3011 · 30:07
    MediumAmazon · Meta · +2 more companiesLeetCode ↗ (opens in a new tab)
  240. Maximum Beauty of an Array After Applying OperationLC 2779 · 58:36
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  241. Max Chunks To Make SortedLC 769 · 36:04
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  242. Make Lexicographically Smallest Array by Swapping ElementsLC 2948 · 59:07
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  243. Max Sum of a Pair With Equal Sum of DigitsLC 2342 · 25:31
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  244. Count Days Without MeetingsLC 3169 · 18:09
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  245. Sort Matrix by DiagonalsLC 3446 · 38:17
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  246. Find the Number of Ways to Place People ILC 3025 · 42:42
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  247. Find the Number of Ways to Place People IILC 3027 · 7:09
    HardGoogle · Meta · +1 more companiesLeetCode ↗ (opens in a new tab)
  248. Valid Triangle NumberLC 611 · 29:32
    MediumGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  249. Minimum Absolute Difference in Sliding SubmatrixLC 3567 · 16:49
    MediumGoogle · AmazonLeetCode ↗ (opens in a new tab)
  250. Earliest Finish Time for Land and Water Rides I and IILC 3633 · 33:28
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  251. Minimum Operations to Sort a PermutationLC 3942 · 47:24
    MediumAmazonLeetCode ↗ (opens in a new tab)
  252. Maximum Product of Two Elements in an ArrayLC 1464 · 8:28
    EasyGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  253. Maximum Product Difference Between Two PairsLC 1913 · 9:46
    EasyLeetCode ↗ (opens in a new tab)
  254. Buy Two ChocolatesLC 2706 · 6:51
    EasyGoogle · AmazonLeetCode ↗ (opens in a new tab)
  255. Assign CookiesLC 455 · 14:49
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  256. Divide Array Into Arrays With Max DifferenceLC 2966 · 16:02
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  257. Squares of a Sorted ArrayLC 977 · 6:25
    EasyGoogle · Amazon · +15 more companiesLeetCode ↗ (opens in a new tab)
  258. Intersection of Two ArraysLC 349 · 21:08
    EasyGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  259. Largest Positive Integer That Exists With Its NegativeLC 2441 · 28:05
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  260. Relative RanksLC 506 · 30:39
    EasyGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  261. Relative Sort ArrayLC 1122 · 20:15
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  262. Minimum Number of Moves to Seat EveryoneLC 2037 · 21:39
    EasyGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  263. Intersection of Two Arrays IILC 350 · 14:10
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  264. Make Two Arrays Equal by Reversing SubarraysLC 1460 · 12:03
    EasyMeta · BloombergLeetCode ↗ (opens in a new tab)
  265. Check If N and Its Double ExistLC 1346 · 14:57
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  266. Type of TriangleLC 3024 · 9:36
    EasyGoogle · Meta · +3 more companiesLeetCode ↗ (opens in a new tab)
  267. Longest Harmonious SubsequenceLC 594 · 22:35
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  268. Apple Redistribution into BoxesLC 3074 · 9:53
    EasyGoogle · Bloomberg · +1 more companiesLeetCode ↗ (opens in a new tab)
  269. Minimum Pair Removal to Sort Array ILC 3507 · 11:36
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  270. Minimum Difference Between Highest and Lowest of K ScoresLC 1984 · 11:37
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  271. Minimum Absolute DifferenceLC 1200 · 8:49
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  272. Divide an Array Into Subarrays With Minimum Cost ILC 3010 · 9:20
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  273. Check if Array is GoodLC 2784 · 30:42
    EasyGoogle · Microsoft · +1 more companiesLeetCode ↗ (opens in a new tab)
  274. Minimum Cost of Buying Candies With DiscountLC 2144 · 13:21
    EasyAmazon · Meta · +3 more companiesLeetCode ↗ (opens in a new tab)
  275. Find Target Indices After Sorting ArrayLC 2089 · 16:20
    EasyGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  276. Largest Number formed from an ArrayLC 179 · 20:30
    MediumGoogle · Amazon · +17 more companiesLeetCode ↗ (opens in a new tab)

  277. Simulation & Implementation

    0 of 79 passed
  278. Factorial Of Large Numbers - (Microsoft, MakeMyTrip, Adobe):Explanation ➕ Live Coding 🧑🏻‍💻👩🏻‍💻17:17
    LeetCode ↗ (opens in a new tab)
  279. Diagonal TraverseLC 498 · 13:04
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  280. Sum of Even Numbers After Queries-(Asked in Indeed): Explanation ➕ Live Coding 🧑🏻‍💻👩🏻‍💻LC 985 · 20:07
    MediumIndeedLeetCode ↗ (opens in a new tab)
  281. Increasing Triplet Subsequence -(Amazon, Walmart, Facebook): Explanation ➕ Live Coding 🧑🏻‍💻LC 334 · 24:32
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  282. Where Will the Ball Fall -(Amazon) : Explanation ➕ Live CodingLC 1706 · 20:24
    MediumGoogleLeetCode ↗ (opens in a new tab)
  283. Maximum Sum Circular SubarrayLC 918 · 30:55
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  284. Can Place Flowers - (Leetcode - 605) - (GOOGLE) : Explanation ➕ Live CodingLC 605 · 8:31
    EasyGoogle · Amazon · +13 more companiesLeetCode ↗ (opens in a new tab)
  285. Number of Zero-Filled SubarraysLC 2348 · 16:40
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  286. Kids With the Greatest Number of Candies - (Leetcode - 1431) - : Explanation ➕ Live CodingLC 1431 · 5:48
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  287. Summary RangesLC 228 · 13:04
    EasyGoogle · Amazon · +7 more companiesLeetCode ↗ (opens in a new tab)
  288. Pascal's TriangleLC 118 · 14:46
    EasyGoogle · Amazon · +12 more companiesLeetCode ↗ (opens in a new tab)
  289. Median of Two Sorted ArraysLC 4 · 32:10
    HardGoogle · Amazon · +42 more companiesLeetCode ↗ (opens in a new tab)
  290. Monotonic ArrayLC 896 · 7:13
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  291. Pascal's Triangle IILC 119 · 15:42
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  292. Last Moment Before All Ants Fall Out of a PlankLC 1503 · 23:50
    MediumGoogleLeetCode ↗ (opens in a new tab)
  293. Find the Winner of an Array GameLC 1535 · 25:28
    MediumMicrosoft · Goldman Sachs · +1 more companiesLeetCode ↗ (opens in a new tab)
  294. Element Appearing More Than 25% In Sorted ArrayLC 1287 · 25:35
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  295. Difference Between Ones and Zeros in Row and ColumnLC 2482 · 12:46
    MediumAmazonLeetCode ↗ (opens in a new tab)
  296. Sequential DigitsLC 1291 · 21:21
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  297. Rearrange Array Elements by SignLC 2149 · 17:51
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  298. Number of Subarrays That Match a PatternLC 3034 · 37:38
    MediumAmazon · Uber · +3 more companiesLeetCode ↗ (opens in a new tab)
  299. Meeting Rooms IIILC 2402 · 1:00:03
    HardGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  300. Count Alternating SubarraysLC 3031 · 21:31
    MediumCapital OneLeetCode ↗ (opens in a new tab)
  301. Average Waiting TimeLC 1701 · 17:03
    MediumMeta · Salesforce · +1 more companiesLeetCode ↗ (opens in a new tab)
  302. Minimum Operations to Make Array Equal to TargetLC 3229 · 45:23
    HardGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  303. Count Number of TeamsLC 1395 · 24:13
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  304. Spiral Matrix IIILC 885 · 30:57
    MediumGoogle · Meta · +3 more companiesLeetCode ↗ (opens in a new tab)
  305. Find the Student that Will Replace the ChalkLC 1894 · 19:14
    MediumGoogleLeetCode ↗ (opens in a new tab)
  306. Walking Robot SimulationLC 874 · 30:56
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  307. My Calendar ILC 729 · 37:33
    MediumGoogle · Amazon · +10 more companiesLeetCode ↗ (opens in a new tab)
  308. Count Number of Maximum Bitwise-OR SubsetsLC 2044 · 21:07
    MediumGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  309. Minimum Number of Removals to Make Mountain ArrayLC 1671 · 31:03
    HardGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  310. Prime Subtraction OperationLC 2601 · 24:07
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  311. Best Sightseeing PairLC 1014 · 26:36
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  312. Partition Array According to Given PivotLC 2161 · 29:52
    MediumGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  313. Find the Maximum Length of Valid Subsequence ILC 3201 · 24:54
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  314. Minimum Operations to Make Array Elements ZeroLC 3495 · 43:49
    HardGoogle · Meta · +1 more companiesLeetCode ↗ (opens in a new tab)
  315. Find Triangular Sum of an ArrayLC 2221 · 14:01
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  316. Water Bottles IILC 3100 · 21:39
    MediumGoogle · Amazon · +1 more companiesLeetCode ↗ (opens in a new tab)
  317. Find the Minimum Amount of Time to Brew PotionsLC 3494 · 46:41
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  318. Adjacent Increasing Subarrays Detection IILC 3350 · 15:51
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  319. Rotate FunctionLC 396 · 25:54
    MediumGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  320. Jump Game IXLC 3660 · 33:26
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  321. Jump Game IIILC 1306 · 10:12
    MediumGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  322. Removing Minimum and Maximum From ArrayLC 2091 · 12:59
    MediumLeetCode ↗ (opens in a new tab)
  323. Number of Students Unable to Eat LunchLC 1700 · 19:01
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  324. Time Needed to Buy TicketsLC 2073 · 37:29
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  325. Lemonade ChangeLC 860 · 10:53
    EasyGoogle · Amazon · +6 more companiesLeetCode ↗ (opens in a new tab)
  326. Special Array ILC 3151 · 7:56
    EasyGoogle · Meta · +3 more companiesLeetCode ↗ (opens in a new tab)
  327. Check if Array Is Sorted and RotatedLC 1752 · 33:46
    EasyGoogle · Amazon · +8 more companiesLeetCode ↗ (opens in a new tab)
  328. Longest Strictly Increasing or Strictly Decreasing SubarrayLC 3105 · 15:31
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  329. Maximum Ascending Subarray SumLC 1800 · 14:00
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  330. Apply Operations to an ArrayLC 2460 · 18:50
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  331. Count Good TripletsLC 1534 · 10:20
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  332. Count Equal and Divisible Pairs in an ArrayLC 2176 · 30:04
    EasyGoogle · Meta · +3 more companiesLeetCode ↗ (opens in a new tab)
  333. Count Largest GroupLC 1399 · 12:05
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  334. Count Subarrays of Length Three With a ConditionLC 3392 · 6:55
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  335. Find Numbers With Even Number Of DigitsLC 1295 · 11:12
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  336. Three Consecutive OddsLC 1550 · 9:58
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  337. Longest Unequal Adjacent Groups Subsequence ILC 2900 · 15:09
    EasyfourkitesLeetCode ↗ (opens in a new tab)
  338. Maximum Difference Between Adjacent Elements in a Circular ArrayLC 3423 · 3:59
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  339. Maximum Difference Between Increasing ElementsLC 2016 · 10:40
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  340. Count Hills and Valleys in an ArrayLC 2210 · 11:00
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  341. Find N Unique Integers Sum up to ZeroLC 1304 · 9:30
    EasyGoogle · Amazon · +4 more companiesLeetCode ↗ (opens in a new tab)
  342. Convert Integer to the Sum of Two No-Zero IntegersLC 1317 · 25:42
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  343. Adjacent Increasing Subarrays Detection ILC 3349 · 26:51
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  344. Make Array Elements Equal to ZeroLC 3354 · 30:16
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  345. Check If All 1's Are at Least Length K Places AwayLC 1437 · 7:32
    EasyGoogle · Meta · +1 more companiesLeetCode ↗ (opens in a new tab)
  346. 1-bit and 2-bit CharactersLC 717 · 16:59
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  347. Plus OneLC 66 · 17:29
    EasyGoogle · Amazon · +11 more companiesLeetCode ↗ (opens in a new tab)
  348. Trionic Array ILC 3637 · 11:07
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  349. Transformed ArrayLC 3379 · 17:11
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  350. XOR After Range Multiplication Queries ILC 3653 · 8:27
    MediumAmazon · InfosysLeetCode ↗ (opens in a new tab)
  351. Minimum Distance to the Target ElementLC 1848 · 6:49
    EasyGoogle · Amazon · +2 more companiesLeetCode ↗ (opens in a new tab)
  352. Shortest Distance to Target String in a Circular ArrayLC 2515 · 11:53
    EasyAmazon · Microsoft · +2 more companiesLeetCode ↗ (opens in a new tab)
  353. Two Furthest Houses With Different ColorsLC 2078 · 18:42
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)
  354. Count Days Spent TogetherLC 2409 · 18:42
    EasyLeetCode ↗ (opens in a new tab)
  355. Find Smallest Letter Greater Than TargetLC 744 · 14:54
    EasyGoogle · Amazon · +5 more companiesLeetCode ↗ (opens in a new tab)
  356. What is Lambda CaptureLC 2942 · 15:18
    EasyGoogle · Amazon · +3 more companiesLeetCode ↗ (opens in a new tab)

All 271 stations in order

  1. 1.Two Sum (LeetCode 1)
  2. 2.Two Sum II - Input Array Is Sorted : Explanation ➕ Live Coding 🧑🏻‍💻 (In Hinglish) (LeetCode 167)
  3. 3.3 SUM (LeetCode 15)
  4. 4.Trapping Rain Water (LeetCode 42)
  5. 5.3Sum Closest - (Meta, Amazon, Microsoft, Oracle)➕Live Coding 🧑🏻‍💻 (LeetCode 16)
  6. 6.Factorial Of Large Numbers - (Microsoft, MakeMyTrip, Adobe):Explanation ➕ Live Coding 🧑🏻‍💻👩🏻‍💻
  7. 7.Next Permutation (LeetCode 31)
  8. 8.Rotate Image (LeetCode 48)
  9. 9.Container With Most Water (LeetCode 11)
  10. 10.Spiral Matrix (LeetCode 54)
  11. 11.Group Anagrams (LeetCode 49)
  12. 12.Group Anagrams (LeetCode 49)
  13. 13.Sort the Matrix Diagonally (LeetCode 1329)
  14. 14.Diagonal Traverse (LeetCode 498)
  15. 15.Sort Colors (LeetCode 75)
  16. 16.Find Original Array From Doubled Array (LeetCode 2007)
  17. 17.Sum of Even Numbers After Queries-(Asked in Indeed): Explanation ➕ Live Coding 🧑🏻‍💻👩🏻‍💻 (LeetCode 985)
  18. 18.Find Pivot Index (LeetCode 724)
  19. 19.Increasing Triplet Subsequence -(Amazon, Walmart, Facebook): Explanation ➕ Live Coding 🧑🏻‍💻 (LeetCode 334)
  20. 20.Largest Perimeter Triangle (LeetCode 976)
  21. 21.Contains Duplicate II -(Airbnb, Palantir Technologies): Explanation ➕ Live Coding 🧑🏻‍💻 (LeetCode 219)
  22. 22.Set Mismatch (LeetCode 645)
  23. 23.Continuous Subarray Sum (LeetCode 523)
  24. 24.Image Overlap (LeetCode 835)
  25. 25.Shortest Path in a Grid with Obstacles Elimination -(Google) : Explanation ➕ Live Coding (LeetCode 1293)
  26. 26.Toeplitz Matrix -(Google, Meta, Apple) : Explanation ➕ Live Coding (LeetCode 766)
  27. 27.Where Will the Ball Fall -(Amazon) : Explanation ➕ Live Coding (LeetCode 1706)
  28. 28.Valid Sudoku (LeetCode 36)
  29. 29.Minimum Average Difference (LeetCode 2256)
  30. 30.Longest Subsequence With Limited Sum : Explanation ➕ Live Coding👩🏻‍💻🧑🏻‍💻🤯😱 (LeetCode 2389)
  31. 31.Minimum Number of Arrows to Burst Balloons (LeetCode 452)
  32. 32.Insert Interval (LeetCode 57)
  33. 33.Maximum Sum Circular Subarray (LeetCode 918)
  34. 34.Subarray Sums Divisible by K (LeetCode 974)
  35. 35.Find the Town Judge (LeetCode 997)
  36. 36.Snakes and Ladders (LeetCode 909)
  37. 37.Data Stream as Disjoint Intervals - (AMAZON) : Explanation ➕ Live Coding (LeetCode 352)
  38. 38.Jump Game IV (LeetCode 1345)
  39. 39.Can Place Flowers - (Leetcode - 605) - (GOOGLE) : Explanation ➕ Live Coding (LeetCode 605)
  40. 40.Number of Zero-Filled Subarrays (LeetCode 2348)
  41. 41.Number of Closed Islands (LeetCode 1254)
  42. 42.Number of Enclaves - (Leetcode - 1020) - (AMAZON) : Explanation ➕ Live Coding 🧑🏻‍💻👩🏻‍💻 (LeetCode 1020)
  43. 43.Kids With the Greatest Number of Candies - (Leetcode - 1431) - : Explanation ➕ Live Coding (LeetCode 1431)
  44. 44.Spiral Matrix II (LeetCode 59)
  45. 45.Shortest Bridge (LeetCode 934)
  46. 46.Count Negative Numbers in a Sorted Matrix (LeetCode 1351)
  47. 47.Summary Ranges (LeetCode 228)
  48. 48.K Radius Subarray Averages (LeetCode 2090)
  49. 49.Shortest Path to Get All Keys (LeetCode 864)
  50. 50.Put Marbles in Bags (LeetCode 2551)
  51. 51.Non-overlapping Intervals (LeetCode 435)
  52. 52.Kth Largest Element in an Array (LeetCode 215)
  53. 53.01 Matrix (LeetCode 542)
  54. 54.Minimum Penalty for a Shop (LeetCode 2483)
  55. 55.Pascal's Triangle (LeetCode 118)
  56. 56.Group the People Given the Group Size They Belong To (LeetCode 1282)
  57. 57.The K Weakest Rows in a Matrix (LeetCode 1337)
  58. 58.Find the Duplicate Number (LeetCode 287)
  59. 59.Minimum Operations to Reduce X to Zero (LeetCode 1658)
  60. 60.Median of Two Sorted Arrays (LeetCode 4)
  61. 61.Sort Array By Parity (LeetCode 905)
  62. 62.Monotonic Array (LeetCode 896)
  63. 63.Majority Element I (LeetCode 229)
  64. 64.Minimum Number of Operations to Make Array Continuous (LeetCode 2009)
  65. 65.Pascal's Triangle II (LeetCode 119)
  66. 66.Last Moment Before All Ants Fall Out of a Plank (LeetCode 1503)
  67. 67.Find the Winner of an Array Game (LeetCode 1535)
  68. 68.Reduction Operations to Make the Array Elements Equal (LeetCode 1887)
  69. 69.Minimum Amount of Time to Collect Garbage (LeetCode 2391)
  70. 70.Diagonal Traverse II (LeetCode 1424)
  71. 71.Arithmetic Subarrays (LeetCode 1630)
  72. 72.Sum of Absolute Differences in a Sorted Array (LeetCode 1685)
  73. 73.Largest Submatrix With Rearrangements (LeetCode 1727)
  74. 74.Element Appearing More Than 25% In Sorted Array (LeetCode 1287)
  75. 75.Difference Between Ones and Zeros in Row and Column (LeetCode 2482)
  76. 76.Image Smoother (LeetCode 661)
  77. 77.Widest Vertical Area Between Two Points Containing No Points (LeetCode 1637)
  78. 78.Anti Diagonal Traversal of Matrix
  79. 79.Convert an Array Into a 2D Array With Conditions (LeetCode 2610)
  80. 80.Number of Submatrices That Sum to Target (LeetCode 1074)
  81. 81.Sequential Digits (LeetCode 1291)
  82. 82.Rearrange Array Elements by Sign (LeetCode 2149)
  83. 83.Number of Subarrays That Match a Pattern (LeetCode 3034)
  84. 84.Meeting Rooms III (LeetCode 2402)
  85. 85.Product of Array Except Self (LeetCode 238)
  86. 86.Contiguous Array (LeetCode 525)
  87. 87.Find All Duplicates in an Array (LeetCode 442)
  88. 88.First Missing Positive (LeetCode 41)
  89. 89.Count Alternating Subarrays (LeetCode 3031)
  90. 90.Island Perimeter (LeetCode 463)
  91. 91.Number of Islands (LeetCode 200)
  92. 92.Find All Groups of Farmland (LeetCode 1992)
  93. 93.Count Number of Nice Subarrays (LeetCode 1248)
  94. 94.Minimum Number of K Consecutive Bit Flips (LeetCode 995)
  95. 95.Minimum Difference Between Largest and Smallest Value in Three Moves (LeetCode 1509)
  96. 96.Average Waiting Time (LeetCode 1701)
  97. 97.Find Valid Matrix Given Row and Column Sums (LeetCode 1605)
  98. 98.Minimum Operations to Make Array Equal to Target (LeetCode 3229)
  99. 99.Count Number of Teams (LeetCode 1395)
  100. 100.Spiral Matrix III (LeetCode 885)
  101. 101.Magic Squares In Grid (LeetCode 840)
  102. 102.Regions Cut By Slashes (LeetCode 959)
  103. 103.Minimum Number of Days to Disconnect Island (LeetCode 1568)
  104. 104.Count Sub Islands (LeetCode 1905)
  105. 105.Find the Student that Will Replace the Chalk (LeetCode 1894)
  106. 106.Walking Robot Simulation (LeetCode 874)
  107. 107.Spiral Matrix IV (LeetCode 2326)
  108. 108.Longest Subarray With Maximum Bitwise AND (LeetCode 2419)
  109. 109.Minimum Time Difference (LeetCode 539)
  110. 110.My Calendar I (LeetCode 729)
  111. 111.My Calendar II (LeetCode 731)
  112. 112.Make Sum Divisible by P (LeetCode 1590)
  113. 113.Divide Players Into Teams of Equal Skill (LeetCode 2491)
  114. 114.The Number of the Smallest Unoccupied Chair (LeetCode 1942)
  115. 115.Divide Intervals Into Minimum Number of Groups (LeetCode 2406)
  116. 116.Count Number of Maximum Bitwise-OR Subsets (LeetCode 2044)
  117. 117.Longest Square Streak in an Array (LeetCode 2501)
  118. 118.Maximum Number of Moves in a Grid (LeetCode 2684)
  119. 119.Minimum Number of Removals to Make Mountain Array (LeetCode 1671)
  120. 120.Find if Array Can Be Sorted (LeetCode 3011)
  121. 121.Prime Subtraction Operation (LeetCode 2601)
  122. 122.Shortest Subarray to be Removed to Make Array Sorted (LeetCode 1574)
  123. 123.Count Unguarded Cells in the Grid (LeetCode 2257)
  124. 124.Flip Columns For Maximum Number of Equal Rows (LeetCode 1072)
  125. 125.Rotating the Box (LeetCode 1861)
  126. 126.Maximum Matrix Sum (LeetCode 1975)
  127. 127.Sliding Puzzle (LeetCode 773)
  128. 128.Two Best Non-Overlapping Events (LeetCode 2054)
  129. 129.Special Array II (LeetCode 3152)
  130. 130.Maximum Beauty of an Array After Applying Operation (LeetCode 2779)
  131. 131.Max Chunks To Make Sorted (LeetCode 769)
  132. 132.Best Sightseeing Pair (LeetCode 1014)
  133. 133.Count Vowel Strings in Ranges (LeetCode 2559)
  134. 134.Number of Ways to Split Array (LeetCode 2270)
  135. 135.Find the Prefix Common Array of Two Arrays (LeetCode 2657)
  136. 136.First Completely Painted Row or Column (LeetCode 2661)
  137. 137.Grid Game (LeetCode 2017)
  138. 138.Make Lexicographically Smallest Array by Swapping Elements (LeetCode 2948)
  139. 139.Count Servers that Communicate (LeetCode 1267)
  140. 140.Tuple with Same Product (LeetCode 1726)
  141. 141.Max Sum of a Pair With Equal Sum of Digits (LeetCode 2342)
  142. 142.Product of the Last K Numbers (LeetCode 1352)
  143. 143.Number of Sub-arrays With Odd Sum (LeetCode 1524)
  144. 144.Maximum Absolute Sum of Any Subarray (LeetCode 1749)
  145. 145.Partition Array According to Given Pivot (LeetCode 2161)
  146. 146.Count Days Without Meetings (LeetCode 3169)
  147. 147.Check if Grid can be Cut into Sections (LeetCode 3394)
  148. 148.Maximum Number of Points From Grid Queries (LeetCode 2503)
  149. 149.Count of Interesting Subarrays (LeetCode 2845)
  150. 150.Set Matrix Zeroes (LeetCode 73)
  151. 151.Find the Maximum Length of Valid Subsequence I (LeetCode 3201)
  152. 152.Range Product Queries of Powers (LeetCode 2438)
  153. 153.Count Submatrices With All Ones (LeetCode 1504)
  154. 154.Find the Minimum Area to Cover All Ones I (LeetCode 3195)
  155. 155.Find the Minimum Area to Cover All Ones II (LeetCode 3197)
  156. 156.Sort Matrix by Diagonals (LeetCode 3446)
  157. 157.Find the Number of Ways to Place People I (LeetCode 3025)
  158. 158.Find the Number of Ways to Place People II (LeetCode 3027)
  159. 159.Minimum Operations to Make Array Elements Zero (LeetCode 3495)
  160. 160.Valid Triangle Number (LeetCode 611)
  161. 161.Find Triangular Sum of an Array (LeetCode 2221)
  162. 162.Water Bottles II (LeetCode 3100)
  163. 163.Pacific Atlantic Water Flow (LeetCode 417)
  164. 164.Find the Minimum Amount of Time to Brew Potions (LeetCode 3494)
  165. 165.Adjacent Increasing Subarrays Detection II (LeetCode 3350)
  166. 166.Maximum Frequency of an Element After Performing Operations I (LeetCode 3346)
  167. 167.Maximum Subarray Sum With Length Divisible by K (LeetCode 3381)
  168. 168.Number of Smooth Descent Periods of a Stock (LeetCode 2110)
  169. 169.Maximize Area of Square Hole in Grid (LeetCode 2943)
  170. 170.Largest Magic Square (LeetCode 1895)
  171. 171.Maximum Side Length of a Square with Sum Less than or Equal to Threshold (LeetCode 1292)
  172. 172.Minimum Swaps to Arrange a Binary Grid (LeetCode 1536)
  173. 173.Get Biggest Three Rhombus Sums in a Grid (LeetCode 1878)
  174. 174.Count Submatrices with Top-Left Element and Sum Less Than k (LeetCode 3070)
  175. 175.Count Submatrices With Equal Frequency of X and Y (LeetCode 3212)
  176. 176.Minimum Absolute Difference in Sliding Submatrix (LeetCode 3567)
  177. 177.Construct Product Matrix (LeetCode 2906)
  178. 178.Equal Sum Grid Partition I (LeetCode 3546)
  179. 179.Equal Sum Grid Partition II (LeetCode 3548)
  180. 180.Sum of Distances (LeetCode 2615)
  181. 181.Rotate Function (LeetCode 396)
  182. 182.Jump Game IX (LeetCode 3660)
  183. 183.Cyclically Rotating a Grid (LeetCode 1914)
  184. 184.Jump Game III (LeetCode 1306)
  185. 185.Earliest Finish Time for Land and Water Rides I and II (LeetCode 3633)
  186. 186.Count Subarrays With Majority Element I and II (LeetCode 3737)
  187. 187.Concatenate Non-Zero Digits and Multiply by Sum II (LeetCode 3756)
  188. 188.Rotate Array (LeetCode 189)
  189. 189.Maximum Sum of Two Non-Overlapping Subarrays (LeetCode 1031)
  190. 190.Minimum Cost Homecoming of a Robot in a Grid (LeetCode 2087)
  191. 191.Removing Minimum and Maximum From Array (LeetCode 2091)
  192. 192.Minimum Moves to Clean the Classroom (LeetCode 3568)
  193. 193.Minimum Operations to Sort a Permutation (LeetCode 3942)
  194. 194.Count Islands With Total Value Divisible by K (LeetCode 3619)
  195. 195.Transpose Matrix (LeetCode 867)
  196. 196.Maximum Product of Two Elements in an Array (LeetCode 1464)
  197. 197.Special Positions in a Binary Matrix (LeetCode 1582)
  198. 198.Maximum Product Difference Between Two Pairs (LeetCode 1913)
  199. 199.Buy Two Chocolates (LeetCode 2706)
  200. 200.Assign Cookies (LeetCode 455)
  201. 201.Divide Array Into Arrays With Max Difference (LeetCode 2966)
  202. 202.Squares of a Sorted Array (LeetCode 977)
  203. 203.Count Elements With Maximum Frequency (LeetCode 3005)
  204. 204.Minimum Common Value (LeetCode 2540)
  205. 205.Intersection of Two Arrays (LeetCode 349)
  206. 206.Number of Students Unable to Eat Lunch (LeetCode 1700)
  207. 207.Time Needed to Buy Tickets (LeetCode 2073)
  208. 208.Largest Positive Integer That Exists With Its Negative (LeetCode 2441)
  209. 209.Relative Ranks (LeetCode 506)
  210. 210.Largest Local Values in a Matrix (LeetCode 2373)
  211. 211.Find Common Characters (LeetCode 1002)
  212. 212.Relative Sort Array (LeetCode 1122)
  213. 213.Minimum Number of Moves to Seat Everyone (LeetCode 2037)
  214. 214.Intersection of Two Arrays II (LeetCode 350)
  215. 215.Lucky Numbers in a Matrix (LeetCode 1380)
  216. 216.Make Two Arrays Equal by Reversing Subarrays (LeetCode 1460)
  217. 217.Lemonade Change (LeetCode 860)
  218. 218.Convert 1D Array Into 2D Array (LeetCode 2022)
  219. 219.Check If N and Its Double Exist (LeetCode 1346)
  220. 220.Special Array I (LeetCode 3151)
  221. 221.Check if Array Is Sorted and Rotated (LeetCode 1752)
  222. 222.Longest Strictly Increasing or Strictly Decreasing Subarray (LeetCode 3105)
  223. 223.Maximum Ascending Subarray Sum (LeetCode 1800)
  224. 224.Apply Operations to an Array (LeetCode 2460)
  225. 225.Merge Two 2D Arrays by Summing Values (LeetCode 2570)
  226. 226.Divide Array Into Equal Pairs (LeetCode 2206)
  227. 227.Count Good Triplets (LeetCode 1534)
  228. 228.Count Equal and Divisible Pairs in an Array (LeetCode 2176)
  229. 229.Count Largest Group (LeetCode 1399)
  230. 230.Count Subarrays of Length Three With a Condition (LeetCode 3392)
  231. 231.Find Numbers With Even Number Of Digits (LeetCode 1295)
  232. 232.Three Consecutive Odds (LeetCode 1550)
  233. 233.Longest Unequal Adjacent Groups Subsequence I (LeetCode 2900)
  234. 234.Type of Triangle (LeetCode 3024)
  235. 235.Maximum Difference Between Even and Odd Frequency I (LeetCode 3442)
  236. 236.Maximum Difference Between Adjacent Elements in a Circular Array (LeetCode 3423)
  237. 237.Maximum Difference Between Increasing Elements (LeetCode 2016)
  238. 238.Find All K-Distant Indices in an Array (LeetCode 2200)
  239. 239.Longest Harmonious Subsequence (LeetCode 594)
  240. 240.Count Hills and Valleys in an Array (LeetCode 2210)
  241. 241.Find N Unique Integers Sum up to Zero (LeetCode 1304)
  242. 242.Convert Integer to the Sum of Two No-Zero Integers (LeetCode 1317)
  243. 243.Adjacent Increasing Subarrays Detection I (LeetCode 3349)
  244. 244.Make Array Elements Equal to Zero (LeetCode 3354)
  245. 245.Check If All 1's Are at Least Length K Places Away (LeetCode 1437)
  246. 246.1-bit and 2-bit Characters (LeetCode 717)
  247. 247.Count Partitions with Even Sum Difference (LeetCode 3432)
  248. 248.Apple Redistribution into Boxes (LeetCode 3074)
  249. 249.Plus One (LeetCode 66)
  250. 250.Minimum Pair Removal to Sort Array I (LeetCode 3507)
  251. 251.Minimum Difference Between Highest and Lowest of K Scores (LeetCode 1984)
  252. 252.Minimum Absolute Difference (LeetCode 1200)
  253. 253.Divide an Array Into Subarrays With Minimum Cost I (LeetCode 3010)
  254. 254.Trionic Array I (LeetCode 3637)
  255. 255.Transformed Array (LeetCode 3379)
  256. 256.Flip Square Submatrix Vertically (LeetCode 3643)
  257. 257.Determine Whether Matrix Can Be Obtained By Rotation (LeetCode 1886)
  258. 258.Matrix Similarity After Cyclic Shifts (LeetCode 2946)
  259. 259.XOR After Range Multiplication Queries I (LeetCode 3653)
  260. 260.Minimum Distance to the Target Element (LeetCode 1848)
  261. 261.Shortest Distance to Target String in a Circular Array (LeetCode 2515)
  262. 262.Two Furthest Houses With Different Colors (LeetCode 2078)
  263. 263.Check if Array is Good (LeetCode 2784)
  264. 264.Minimum Cost of Buying Candies With Discount (LeetCode 2144)
  265. 265.Smallest Stable Index I & II (LeetCode 3903)
  266. 266.Find Target Indices After Sorting Array (LeetCode 2089)
  267. 267.Count Days Spent Together (LeetCode 2409)
  268. 268.Find Smallest Letter Greater Than Target (LeetCode 744)
  269. 269.Largest Number formed from an Array (LeetCode 179)
  270. 270.Maximum Count of Positive Integer and Negative Integer (LeetCode 2529)
  271. 271.What is Lambda Capture (LeetCode 2942)