Skip to content

For employers Sign in

Make and follow sheets.Sign in

Strivers A2Z DSAOfficial

This sheet is made for people who want to learn DSA from A to Z for free in a well-organized and structured manner.

By FleetCode249 problems52 Easy154 Medium43 Hard37 followersUpdated 28 May 2025

Start: Reverse Integer

249problems

52Easy

154Medium

43Hard

Signed in, the sheet shows which of these you have solved.

TitleSolutionAcceptDifficultyTopics

7. Reverse IntegerVideo

Solution32.2%Medium

Math· 22 companies

9. Palindrome NumberVideo

Solution61.0%Easy

Math· 31 companies

1134. Armstrong NumberVideoPremium

Solution77.8%Easy

Math· 1 company

1752. Check if Array Is Sorted and RotatedVideo

Solution57.3%Easy

Array· 10 companies

26. Remove Duplicates from Sorted ArrayVideo

Solution63.7%Easy

Array, Two Pointers· 26 companies

189. Rotate ArrayVideo

Solution45.3%Medium

Array, Math +1· 27 companies

283. Move ZeroesVideo

Solution64.3%Easy

Array, Two Pointers· 46 companies

136. Single NumberVideo

Solution78.1%Easy

Array, Bit Manipulation· 15 companies

485. Max Consecutive OnesVideo

Solution66.0%Easy

Array· 14 companies

268. Missing NumberVideo

Solution72.4%Easy

Array, Binary Search +4· 19 companies

125. Valid PalindromeVideo

Solution54.2%Easy

String, Two Pointers· 39 companies

509. Fibonacci NumberVideo

Solution74.6%Easy

Dynamic Programming, Math +2· 16 companies

1838. Frequency of the Most Frequent ElementVideo

Solution45.3%Medium

Array, Binary Search +4· 11 companies

1. Two SumVideo

Solution57.8%Easy

Array, Hash Table· 127 companies

75. Sort ColorsVideo

Solution69.9%Medium

Array, Sorting +1· 37 companies

169. Majority ElementVideo

Solution66.2%Easy

Array, Counting +3· 22 companies

53. Maximum SubarrayVideo

Solution53.7%Medium

Array, Divide and Conquer +1· 64 companies

121. Best Time to Buy and Sell StockVideo

Solution57.1%Easy

Array, Dynamic Programming· 92 companies

2149. Rearrange Array Elements by SignVideo

Solution84.7%Medium

Array, Simulation +1· 6 companies

31. Next PermutationVideo

Solution46.1%Medium

Array, Two Pointers· 31 companies

128. Longest Consecutive SequenceVideo

Solution47.0%Medium

Array, Hash Table +1· 40 companies

73. Set Matrix ZeroesVideo

Solution63.8%Medium

Array, Hash Table +1· 22 companies

48. Rotate ImageVideo

Solution80.7%Medium

Array, Math +1· 36 companies

54. Spiral MatrixVideo

Solution58.2%Medium

Array, Matrix +1· 49 companies

560. Subarray Sum Equals KVideo

Solution48.2%Medium

Array, Hash Table +1· 47 companies

118. Pascal's TriangleVideo

Solution79.4%Easy

Array, Dynamic Programming· 17 companies

229. Majority Element IIVideo

Solution56.5%Medium

Array, Counting +2· 9 companies

15. 3SumVideo

Solution40.1%Medium

Array, Sorting +1· 57 companies

18. 4SumVideo

Solution42.0%Medium

Array, Sorting +1· 20 companies

56. Merge IntervalsVideo

Solution52.6%Medium

Array, Sorting· 112 companies

88. Merge Sorted ArrayVideo

Solution55.7%Easy

Array, Sorting +1· 37 companies

493. Reverse PairsVideo

Solution35.1%Hard

Array, Binary Indexed Tree +5· 9 companies

152. Maximum Product SubarrayVideo

Solution37.3%Medium

Array, Dynamic Programming· 23 companies

704. Binary SearchVideo

Solution61.2%Easy

Array, Binary Search· 11 companies

35. Search Insert PositionVideo

Solution52.1%Easy

Array, Binary Search· 12 companies

34. Find First and Last Position of Element in Sorted ArrayVideo

Solution49.7%Medium

Array, Binary Search· 29 companies

33. Search in Rotated Sorted ArrayVideo

Solution45.5%Medium

Array, Binary Search· 53 companies

81. Search in Rotated Sorted Array IIVideo

Solution40.4%Medium

Array, Binary Search· 10 companies

153. Find Minimum in Rotated Sorted ArrayVideo

Solution55.3%Medium

Array, Binary Search· 18 companies

540. Single Element in a Sorted ArrayVideo

Solution59.3%Medium

Array, Binary Search· 19 companies

162. Find Peak ElementVideo

Solution46.8%Medium

Array, Binary Search· 30 companies

875. Koko Eating BananasVideo

Solution50.4%Medium

Array, Binary Search· 47 companies

1482. Minimum Number of Days to Make m BouquetsVideo

Solution56.9%Medium

Array, Binary Search· 9 companies

1283. Find the Smallest Divisor Given a ThresholdVideo

Solution66.8%Medium

Array, Binary Search· 12 companies

1011. Capacity To Ship Packages Within D DaysVideo

Solution74.8%Medium

Array, Binary Search· 20 companies

1539. Kth Missing Positive NumberVideo

Solution63.9%Easy

Array, Binary Search· 9 companies

410. Split Array Largest SumVideo

Solution61.2%Hard

Array, Binary Search +3· 20 companies

774. Minimize Max Distance to Gas StationVideoPremium

Solution53.9%Hard

Array, Binary Search· 2 companies

4. Median of Two Sorted ArraysVideo

Solution47.9%Hard

Array, Binary Search +1· 45 companies

74. Search a 2D MatrixVideo

Solution54.4%Medium

Array, Binary Search +1· 19 companies

240. Search a 2D Matrix IIVideo

Solution58.2%Medium

Array, Binary Search +2· 16 companies

1901. Find a Peak Element IIVideo

Solution55.7%Medium

Array, Binary Search +1· 7 companies

1021. Remove Outermost ParenthesesVideo

Solution88.3%Easy

Stack, String· 6 companies

151. Reverse Words in a StringVideo

Solution57.8%Medium

String, Two Pointers· 30 companies

1903. Largest Odd Number in StringVideo

Solution67.7%Easy

Greedy, Math +1· 6 companies

14. Longest Common PrefixVideo

Solution48.6%Easy

String, Trie· 60 companies

205. Isomorphic StringsVideo

Solution48.8%Easy

Hash Table, String· 15 companies

796. Rotate StringVideo

Solution66.6%Easy

String, String Matching· 12 companies

242. Valid AnagramVideo

Solution68.5%Easy

Hash Table, Sorting +1· 40 companies

451. Sort Characters By FrequencyVideo

Solution75.8%Medium

Bucket Sort, Counting +4· 16 companies

1614. Maximum Nesting Depth of the ParenthesesVideo

Solution86.1%Easy

Stack, String· 7 companies

13. Roman to IntegerVideo

Solution67.0%Easy

Hash Table, Math +1· 36 companies

8. String to Integer (atoi)Video

Solution21.4%Medium

String· 21 companies

5. Longest Palindromic SubstringVideo

Solution38.7%Medium

Dynamic Programming, String +1· 81 companies

1781. Sum of Beauty of All SubstringsVideo

Solution74.9%Medium

Counting, Hash Table +1· 6 companies

237. Delete Node in a Linked ListVideo

Solution84.3%Medium

Linked List· 10 companies

876. Middle of the Linked ListVideo

Solution82.3%Easy

Linked List, Two Pointers· 13 companies

206. Reverse Linked ListVideo

Solution81.0%Easy

Linked List, Recursion· 34 companies

141. Linked List CycleVideo

Solution55.2%Easy

Hash Table, Linked List +1· 24 companies

142. Linked List Cycle IIVideo

Solution59.3%Medium

Hash Table, Linked List +1· 13 companies

234. Palindrome Linked ListVideo

Solution58.8%Easy

Linked List, Recursion +2· 17 companies

328. Odd Even Linked ListVideo

Solution62.4%Medium

Linked List· 12 companies

19. Remove Nth Node From End of ListVideo

Solution52.4%Medium

Linked List, Two Pointers· 18 companies

2095. Delete the Middle Node of a Linked ListVideo

Solution60.4%Medium

Linked List, Two Pointers· 7 companies

148. Sort ListVideo

Solution65.2%Medium

Divide and Conquer, Linked List +3· 9 companies

160. Intersection of Two Linked ListsVideo

Solution64.6%Easy

Hash Table, Linked List +1· 13 companies

2. Add Two NumbersVideo

Solution49.3%Medium

Linked List, Math +1· 37 companies

25. Reverse Nodes in k-GroupVideo

Solution67.4%Hard

Linked List, Recursion· 27 companies

61. Rotate ListVideo

Solution43.1%Medium

Linked List, Two Pointers· 9 companies

138. Copy List with Random PointerVideo

Solution63.8%Medium

Hash Table, Linked List· 22 companies

50. Pow(x, n)Video

Solution39.0%Medium

Math, Recursion· 22 companies

1922. Count Good NumbersVideo

Solution58.1%Medium

Math, Recursion· 7 companies

22. Generate ParenthesesVideo

Solution79.6%Medium

Backtracking, Dynamic Programming +1· 40 companies

78. SubsetsVideo

Solution82.7%Medium

Array, Backtracking +1· 21 companies

39. Combination SumVideo

Solution76.9%Medium

Array, Backtracking· 26 companies

40. Combination Sum IIVideo

Solution60.3%Medium

Array, Backtracking· 15 companies

90. Subsets IIVideo

Solution61.7%Medium

Array, Backtracking +1· 9 companies

216. Combination Sum IIIVideo

Solution73.6%Medium

Array, Backtracking· 4 companies

17. Letter Combinations of a Phone NumberVideo

Solution66.9%Medium

Backtracking, Hash Table +1· 34 companies

131. Palindrome PartitioningVideo

Solution74.4%Medium

Backtracking, Dynamic Programming +1· 10 companies

79. Word SearchVideo

Solution48.2%Medium

Array, Backtracking +2· 36 companies

51. N-QueensVideo

Solution76.3%Hard

Array, Backtracking· 16 companies

139. Word BreakVideo

Solution49.8%Medium

Array, Dynamic Programming +4· 32 companies

37. Sudoku SolverVideo

Solution65.4%Hard

Array, Backtracking +2· 17 companies

282. Expression Add OperatorsVideo

Solution43.5%Hard

Backtracking, Math +1· 7 companies

29. Divide Two IntegersVideo

Solution20.1%Medium

Bit Manipulation, Math· 8 companies

2220. Minimum Bit Flips to Convert NumberVideo

Solution88.0%Easy

Bit Manipulation· 7 companies

204. Count PrimesVideo

Solution35.8%Medium

Array, Enumeration +2· 17 companies

225. Implement Stack using QueuesVideo

Solution70.1%Easy

Design, Queue +1· 9 companies

232. Implement Queue using StacksVideo

Solution70.2%Easy

Design, Queue +1· 12 companies

20. Valid ParenthesesVideo

Solution45.2%Easy

Stack, String· 113 companies

155. Min StackVideo

Solution58.5%Medium

Design, Stack· 37 companies

496. Next Greater Element IVideo

Solution76.5%Easy

Array, Hash Table +2· 17 companies

503. Next Greater Element IIVideo

Solution69.3%Medium

Array, Monotonic Stack +1· 16 companies

42. Trapping Rain WaterVideo

Solution68.2%Hard

Array, Dynamic Programming +3· 73 companies

907. Sum of Subarray MinimumsVideo

Solution39.0%Medium

Array, Dynamic Programming +2· 13 companies

735. Asteroid CollisionVideo

Solution49.2%Medium

Array, Simulation +1· 32 companies

2104. Sum of Subarray RangesVideo

Solution61.6%Medium

Array, Monotonic Stack +1· 9 companies

402. Remove K DigitsVideo

Solution37.7%Medium

Greedy, Monotonic Stack +2· 21 companies

84. Largest Rectangle in HistogramVideo

Solution50.7%Hard

Array, Monotonic Stack +1· 30 companies

85. Maximal RectangleVideo

Solution60.1%Hard

Array, Dynamic Programming +3· 15 companies

239. Sliding Window MaximumVideo

Solution49.1%Hard

Array, Heap (Priority Queue) +3· 48 companies

901. Online Stock SpanVideo

Solution69.5%Medium

Data Stream, Design +2· 7 companies

277. Find the CelebrityVideoPremium

Solution48.9%Medium

Graph, Interactive +1· 12 companies

460. LFU CacheVideo

Solution50.6%Hard

Design, Doubly-Linked List +2· 32 companies

146. LRU CacheVideo

Solution48.2%Medium

Design, Doubly-Linked List +2· 120 companies

3. Longest Substring Without Repeating CharactersVideo

Solution39.9%Medium

Hash Table, Sliding Window +1· 104 companies

1004. Max Consecutive Ones IIIVideo

Solution68.6%Medium

Array, Binary Search +2· 20 companies

424. Longest Repeating Character ReplacementVideo

Solution60.4%Medium

Hash Table, Sliding Window +1· 22 companies

930. Binary Subarrays With SumVideo

Solution69.7%Medium

Array, Hash Table +2· 7 companies

1248. Count Number of Nice SubarraysVideo

Solution75.5%Medium

Array, Hash Table +3· 9 companies

1358. Number of Substrings Containing All Three CharactersVideo

Solution74.4%Medium

Hash Table, Sliding Window +1· 6 companies

1423. Maximum Points You Can Obtain from CardsVideo

Solution58.1%Medium

Array, Prefix Sum +1· 11 companies

340. Longest Substring with At Most K Distinct CharactersVideoPremium

Solution49.9%Medium

Hash Table, Sliding Window +1· 12 companies

992. Subarrays with K Different IntegersVideo

Solution69.0%Hard

Array, Counting +2· 18 companies

76. Minimum Window SubstringVideo

Solution48.3%Hard

Hash Table, Sliding Window +1· 35 companies

727. Minimum Window SubsequenceVideoPremium

Solution43.5%Hard

Dynamic Programming, Sliding Window +1· 5 companies

215. Kth Largest Element in an ArrayVideo

Solution69.4%Medium

Array, Divide and Conquer +3· 41 companies

23. Merge k Sorted ListsVideo

Solution60.3%Hard

Divide and Conquer, Heap (Priority Queue) +2· 50 companies

621. Task SchedulerVideo

Solution64.0%Medium

Array, Counting +4· 24 companies

846. Hand of StraightsVideo

Solution58.5%Medium

Array, Greedy +2· 6 companies

355. Design TwitterVideo

Solution45.6%Medium

Design, Hash Table +2· 14 companies

703. Kth Largest Element in a StreamVideo

Solution61.4%Easy

Binary Search Tree, Binary Tree +4· 11 companies

295. Find Median from Data StreamVideo

Solution54.9%Hard

Data Stream, Design +3· 40 companies

347. Top K Frequent ElementsVideo

Solution67.3%Medium

Array, Bucket Sort +6· 53 companies

455. Assign CookiesVideo

Solution55.4%Easy

Array, Greedy +2· 9 companies

860. Lemonade ChangeVideo

Solution59.6%Easy

Array, Greedy· 8 companies

678. Valid Parenthesis StringVideo

Solution42.8%Medium

Dynamic Programming, Greedy +2· 15 companies

55. Jump GameVideo

Solution41.2%Medium

Array, Dynamic Programming +1· 33 companies

45. Jump Game IIVideo

Solution43.2%Medium

Array, Dynamic Programming +1· 26 companies

135. CandyVideo

Solution49.3%Hard

Array, Greedy· 24 companies

57. Insert IntervalVideo

Solution46.1%Medium

Array· 16 companies

435. Non-overlapping IntervalsVideo

Solution57.5%Medium

Array, Dynamic Programming +2· 18 companies

144. Binary Tree Preorder TraversalVideo

Solution76.6%Easy

Binary Tree, Depth-First Search +2· 5 companies

94. Binary Tree Inorder TraversalVideo

Solution80.4%Easy

Binary Tree, Depth-First Search +2· 7 companies

145. Binary Tree Postorder TraversalVideo

Solution79.0%Easy

Binary Tree, Depth-First Search +2· 5 companies

102. Binary Tree Level Order TraversalVideo

Solution73.5%Medium

Binary Tree, Breadth-First Search +1· 16 companies

104. Maximum Depth of Binary TreeVideo

Solution78.6%Easy

Binary Tree, Breadth-First Search +2· 17 companies

110. Balanced Binary TreeVideo

Solution59.2%Easy

Binary Tree, Depth-First Search +1· 9 companies

543. Diameter of Binary TreeVideo

Solution66.4%Easy

Binary Tree, Depth-First Search +1· 20 companies

124. Binary Tree Maximum Path SumVideo

Solution42.7%Hard

Binary Tree, Depth-First Search +2· 25 companies

100. Same TreeVideo

Solution68.0%Easy

Binary Tree, Breadth-First Search +2· 9 companies

103. Binary Tree Zigzag Level Order TraversalVideo

Solution64.4%Medium

Binary Tree, Breadth-First Search +1· 19 companies

545. Boundary of Binary TreeVideoPremium

Solution48.0%Medium

Binary Tree, Depth-First Search +1· 10 companies

314. Binary Tree Vertical Order TraversalVideoPremium

Solution57.8%Medium

Binary Tree, Breadth-First Search +4· 9 companies

199. Binary Tree Right Side ViewVideo

Solution71.5%Medium

Binary Tree, Breadth-First Search +2· 14 companies

101. Symmetric TreeVideo

Solution62.1%Easy

Binary Tree, Breadth-First Search +2· 11 companies

236. Lowest Common Ancestor of a Binary TreeVideo

Solution70.1%Medium

Binary Tree, Depth-First Search +1· 22 companies

662. Maximum Width of Binary TreeVideo

Solution46.0%Medium

Binary Tree, Breadth-First Search +2· 8 companies

863. All Nodes Distance K in Binary TreeVideo

Solution68.1%Medium

Binary Tree, Breadth-First Search +3· 16 companies

222. Count Complete Tree NodesVideo

Solution72.6%Medium

Binary Search, Binary Tree +2· 7 companies

105. Construct Binary Tree from Preorder and Inorder TraversalVideo

Solution69.7%Medium

Array, Binary Tree +3· 9 companies

106. Construct Binary Tree from Inorder and Postorder TraversalVideo

Solution69.4%Medium

Array, Binary Tree +3· 7 companies

297. Serialize and Deserialize Binary TreeVideo

Solution61.1%Hard

Binary Tree, Breadth-First Search +4· 23 companies

114. Flatten Binary Tree to Linked ListVideo

Solution71.6%Medium

Binary Tree, Depth-First Search +3· 8 companies

700. Search in a Binary Search TreeVideo

Solution83.1%Easy

Binary Search Tree, Binary Tree +1· 5 companies

701. Insert into a Binary Search TreeVideo

Solution73.6%Medium

Binary Search Tree, Binary Tree +1· 7 companies

450. Delete Node in a BSTVideo

Solution55.1%Medium

Binary Search Tree, Binary Tree +1· 11 companies

230. Kth Smallest Element in a BSTVideo

Solution77.2%Medium

Binary Search Tree, Binary Tree +2· 12 companies

98. Validate Binary Search TreeVideo

Solution36.1%Medium

Binary Search Tree, Binary Tree +2· 18 companies

235. Lowest Common Ancestor of a Binary Search TreeVideo

Solution71.4%Medium

Binary Search Tree, Binary Tree +2· 10 companies

1008. Construct Binary Search Tree from Preorder TraversalVideo

Solution84.7%Medium

Array, Binary Search Tree +4· 5 companies

285. Inorder Successor in BSTVideoPremium

Solution51.2%Medium

Binary Search Tree, Binary Tree +2· 6 companies

173. Binary Search Tree IteratorVideo

Solution76.9%Medium

Binary Search Tree, Binary Tree +4· 8 companies

653. Two Sum IV - Input is a BSTVideo

Solution63.7%Easy

Binary Search Tree, Binary Tree +5· 8 companies

99. Recover Binary Search TreeVideo

Solution60.9%Medium

Binary Search Tree, Binary Tree +2· 8 companies

323. Number of Connected Components in an Undirected GraphVideoPremium

Solution64.9%Medium

Breadth-First Search, Depth-First Search +2· 7 companies

547. Number of ProvincesVideo

Solution70.8%Medium

Breadth-First Search, Depth-First Search +2· 9 companies

994. Rotting OrangesVideo

Solution59.5%Medium

Array, Breadth-First Search +1· 52 companies

733. Flood FillVideo

Solution68.6%Easy

Array, Breadth-First Search +2· 12 companies

542. 01 MatrixVideo

Solution54.7%Medium

Array, Breadth-First Search +2· 14 companies

130. Surrounded RegionsVideo

Solution46.1%Medium

Array, Breadth-First Search +3· 12 companies

1020. Number of EnclavesVideo

Solution72.2%Medium

Array, Breadth-First Search +3· 5 companies

127. Word LadderVideo

Solution46.3%Hard

Breadth-First Search, Hash Table +1· 41 companies

126. Word Ladder IIVideo

Solution27.7%Hard

Backtracking, Breadth-First Search +2· 15 companies

711. Number of Distinct Islands IIVideoPremium

Solution55.3%Hard

Breadth-First Search, Depth-First Search +3· 2 companies

785. Is Graph Bipartite?Video

Solution59.6%Medium

Breadth-First Search, Depth-First Search +2· 11 companies

210. Course Schedule IIVideo

Solution56.3%Medium

Breadth-First Search, Depth-First Search +2· 36 companies

207. Course ScheduleVideo

Solution52.2%Medium

Breadth-First Search, Depth-First Search +2· 45 companies

802. Find Eventual Safe StatesVideo

Solution71.6%Medium

Breadth-First Search, Depth-First Search +2· 7 companies

269. Alien DictionaryVideoPremium

Solution37.1%Hard

Array, Breadth-First Search +4· 18 companies

1091. Shortest Path in Binary MatrixVideo

Solution51.8%Medium

Array, Breadth-First Search +1· 15 companies

1631. Path With Minimum EffortVideo

Solution64.1%Medium

Array, Binary Search +5· 9 companies

787. Cheapest Flights Within K StopsVideo

Solution42.7%Medium

Breadth-First Search, Depth-First Search +4· 18 companies

743. Network Delay TimeVideo

Solution61.7%Medium

Breadth-First Search, Depth-First Search +3· 9 companies

1976. Number of Ways to Arrive at DestinationVideo

Solution37.4%Medium

Dynamic Programming, Graph +2· 5 companies

1334. Find the City With the Smallest Number of Neighbors at a Threshold DistanceVideo

Solution73.5%Medium

Dynamic Programming, Graph +1· 5 companies

1319. Number of Operations to Make Network ConnectedVideo

Solution67.0%Medium

Breadth-First Search, Depth-First Search +2· 10 companies

947. Most Stones Removed with Same Row or ColumnVideo

Solution63.4%Medium

Depth-First Search, Graph +2· 10 companies

721. Accounts MergeVideo

Solution62.2%Medium

Array, Breadth-First Search +5· 17 companies

305. Number of Islands IIVideoPremium

Solution40.5%Hard

Array, Hash Table +1· 10 companies

827. Making A Large IslandVideo

Solution57.0%Hard

Array, Breadth-First Search +3· 16 companies

778. Swim in Rising WaterVideo

Solution68.3%Hard

Array, Binary Search +5· 8 companies

1192. Critical Connections in a NetworkVideo

Solution60.6%Hard

Biconnected Component, Depth-First Search +1· 8 companies

208. Implement Trie (Prefix Tree)Video

Solution69.9%Medium

Design, Hash Table +2· 21 companies

1707. Maximum XOR With an Element From ArrayVideo

Solution59.6%Hard

Array, Bit Manipulation +1· 1 company

421. Maximum XOR of Two Numbers in an ArrayVideo

Solution53.8%Medium

Array, Bit Manipulation +2· 5 companies

921. Minimum Add to Make Parentheses ValidVideo

Solution74.7%Medium

Greedy, Stack +1· 7 companies

38. Count and SayVideo

Solution63.7%Medium

String· 13 companies

686. Repeated String MatchVideo

Solution39.7%Medium

String, String Matching· 6 companies

28. Find the Index of the First Occurrence in a StringVideo

Solution47.0%Easy

String, String Matching +1· 16 companies

214. Shortest PalindromeVideo

Solution43.3%Hard

Hash Function, Rolling Hash +2· 8 companies

1392. Longest Happy PrefixVideo

Solution54.1%Hard

Hash Function, Rolling Hash +2· 6 companies

70. Climbing StairsVideo

Solution54.0%Easy

Dynamic Programming, Math +1· 37 companies

198. House RobberVideo

Solution53.6%Medium

Array, Dynamic Programming· 40 companies

213. House Robber IIVideo

Solution45.3%Medium

Array, Dynamic Programming· 19 companies

62. Unique PathsVideo

Solution67.3%Medium

Combinatorics, Dynamic Programming +1· 21 companies

63. Unique Paths IIVideo

Solution44.9%Medium

Array, Dynamic Programming +1· 9 companies

64. Minimum Path SumVideo

Solution68.6%Medium

Array, Dynamic Programming +1· 17 companies

120. TriangleVideo

Solution59.9%Medium

Array, Dynamic Programming· 11 companies

931. Minimum Falling Path SumVideo

Solution60.8%Medium

Array, Dynamic Programming +1· 8 companies

416. Partition Equal Subset SumVideo

Solution49.9%Medium

Array, Dynamic Programming· 16 companies

2035. Partition Array Into Two Arrays to Minimize Sum DifferenceVideo

Solution24.4%Hard

Array, Binary Search +5· 9 companies

322. Coin ChangeVideo

Solution49.3%Medium

Array, Breadth-First Search +1· 40 companies

494. Target SumVideo

Solution52.6%Medium

Array, Backtracking +1· 10 companies

518. Coin Change IIVideo

Solution59.1%Medium

Array, Dynamic Programming· 11 companies

1143. Longest Common SubsequenceVideo

Solution59.6%Medium

Dynamic Programming, String· 19 companies

516. Longest Palindromic SubsequenceVideo

Solution65.8%Medium

Dynamic Programming, String· 15 companies

1312. Minimum Insertion Steps to Make a String PalindromeVideo

Solution74.3%Hard

Dynamic Programming, String· 7 companies

583. Delete Operation for Two StringsVideo

Solution66.0%Medium

Dynamic Programming, String· 4 companies

1092. Shortest Common Supersequence Video

Solution62.4%Hard

Dynamic Programming, String· 5 companies

115. Distinct SubsequencesVideo

Solution54.1%Hard

Dynamic Programming, String· 13 companies

72. Edit DistanceVideo

Solution61.5%Medium

Dynamic Programming, String· 24 companies

44. Wildcard MatchingVideo

Solution32.8%Hard

Dynamic Programming, Greedy +2· 17 companies

122. Best Time to Buy and Sell Stock IIVideo

Solution71.4%Medium

Array, Dynamic Programming +1· 28 companies

123. Best Time to Buy and Sell Stock IIIVideo

Solution54.5%Hard

Array, Dynamic Programming· 13 companies

188. Best Time to Buy and Sell Stock IVVideo

Solution51.5%Hard

Array, Dynamic Programming· 11 companies

309. Best Time to Buy and Sell Stock with CooldownVideo

Solution62.4%Medium

Array, Dynamic Programming· 8 companies

714. Best Time to Buy and Sell Stock with Transaction FeeVideo

Solution72.4%Medium

Array, Dynamic Programming +1· 8 companies

300. Longest Increasing SubsequenceVideo

Solution59.8%Medium

Array, Binary Search +1· 30 companies

368. Largest Divisible SubsetVideo

Solution50.1%Medium

Array, Dynamic Programming +2· 6 companies

1048. Longest String ChainVideo

Solution63.5%Medium

Array, Dynamic Programming +4· 16 companies

673. Number of Longest Increasing SubsequenceVideo

Solution52.8%Medium

Array, Binary Indexed Tree +2· 6 companies

1547. Minimum Cost to Cut a StickVideo

Solution63.5%Hard

Array, Dynamic Programming +1· 8 companies

312. Burst BalloonsVideo

Solution64.3%Hard

Array, Dynamic Programming· 15 companies

1106. Parsing A Boolean ExpressionVideo

Solution69.8%Hard

Recursion, Stack +1· 8 companies

132. Palindrome Partitioning IIVideo

Solution37.9%Hard

Dynamic Programming, String· 9 companies

1043. Partition Array for Maximum SumVideo

Solution77.4%Medium

Array, Dynamic Programming· 6 companies

1277. Count Square Submatrices with All OnesVideo

Solution80.7%Medium

Array, Dynamic Programming +1· 6 companies

Comments