所有題目

2024

closestNumbers
CyclicRotation
Count number of squares in a rectangle
FrogJmp
BinaryGap
OddOccurrencesInArray
TapeEquilibrium
FrogRiverOne
Filter Installation Strategy
Position of robot after given movements
gameWinner
PermMissingElem
MaxCounters
Minimum Swaps to Sort
MissingInteger
Palindrome Minimization

2023

3255. Find the Power of K-Size Subarrays II
3254. Find the Power of K-Size Subarrays I
3234. Count the Number of Substrings With Dominant Ones
3233. Find the Count of Numbers Which Are Not Special
3232. Find if Digit Game Can Be Won
3228. Maximum Number of Operations to Move Ones to the End
3227. Vowels Game in a String
3226. Number of Bit Changes to Make Two Integers Equal
3223. Minimum Length of String After Operations
3222. Find the Winning Player in Coin Game
3219. Minimum Cost for Cutting Cake II
3218. Minimum Cost for Cutting Cake I
3217. Delete Nodes From Linked List Present in Array
3216. Lexicographically Smallest String After a Swap
3209. Number of Subarrays With AND Value of K
3208. Alternating Groups II
3207. Maximum Points After Enemy Battles
3206. Alternating Groups I
3175. Find The First Player to win K Games in a Row
2807. Insert Greatest Common Divisors in Linked List
2678. Number of Senior Citizens
2658. Maximum Number of Fish in a Grid
2582. Pass the Pillow
2461. Maximum Sum of Distinct Subarrays With Length K
2390. Removing Stars From a String
2334. Subarray With Elements Greater Than Varying Threshold
2326. Spiral Matrix IV
2285. Maximum Total Importance of Roads
2259. Remove Digit From Number to Maximize Result
2220. Minimum Bit Flips to Convert Number
2196. Create Binary Tree From Descriptions
2191. Sort the Jumbled Numbers
2133. Check if Every Row and Column Contains All Numbers
2096. Step-By-Step Directions From a Binary Tree Node to Another
2058. Find the Minimum and Maximum Number of Nodes Between Critical Points
2053. Kth Distinct String in an Array
2037. Minimum Number of Moves to Seat Everyone
1920. Build Array from Permutation
1869. Longer Contiguous Segments of Ones than Zeros
1823. Find the Winner of the Circular Game
1791. Find Center of Star Graph
1742. Maximum Number of Balls in a Box
1701. Average Waiting Time
1684. Count the Number of Consistent Strings
1605. Find Valid Matrix Given Row and Column Sums
1598. Crawler Log Folder
1550. Three Consecutive Odds
1518. Water Bottles
1509. Minimum Difference Between Largest and Smallest Value in Three Moves
1508. Range Sum of Sorted Subarray Sums
1460. Make Two Arrays Equal by Reversing Subarrays
1437. Check If All 1s Are at Least Length K Places Away
1382. Balance a Binary Search Tree
1380. Lucky Numbers in a Matrix
1367. Linked List in Binary Tree
1334. Find the City With the Smallest Number of Neighbors at a Threshold Distance
1328. Break a Palindrome
1190. Reverse Substrings Between Each Pair of Parentheses
1143. Longest Common Subsequence
1123. Lowest Common Ancestor of Deepest Leaves
1122. Relative Sort Array
1110. Delete Nodes And Return Forest
1038. Binary Search Tree to Greater Sum Tree
994. Rotting Oranges
983. Minimum Cost For Tickets
974. Subarray Sums Divisible by K

2022

945. Minimum Increment to Make Array Unique
944. Delete Columns to Make Sorted
931. Minimum Falling Path Sum
918. Maximum Sum Circular Subarray
912. Sort an Array
909. Snakes and Ladders
876. Middle of the Linked List
860. Lemonade Change
856. Score of Parentheses
846. Hand of Straights
844. Backspace String Compare
840. Magic Squares In Grid
826. Most Profit Assigning Work
783. Minimum Distance Between BST Nodes
746. Min Cost Climbing Stairs
739. Daily Temperatures
733. Flood Fill
725. Split Linked List in Parts
721. Accounts Merge
704. Binary Search
695. Max Area of Island
692. Top K Frequent Words
684. Redundant Connection
662. Maximum Width of Binary Tree
658. Find K Closest Elements
650. 2 Keys Keyboard
648. Replace Words
637. Average of Levels in Binary Tree
572. Subtree of Another Tree
547. Number of Provinces
543. Diameter of Binary Tree
542. 01 Matrix
539. Minimum Time Difference
530. Minimum Absolute Difference in BST
525. Contiguous Array
523. Continuous Subarray Sum
509. Fibonacci Number
502. IPO
494. Target Sum
474. Ones and Zeroes
452. Minimum Number of Arrows to Burst Balloons
435. Non-overlapping Intervals
424. Longest Repeating Character Replacement
417. Pacific Atlantic Water Flow
416. Partition Equal Subset Sum
409. Longest Palindrome
399. Evaluate Division
392. Is Subsequence
383. Ransom Note
380. Insert Delete GetRandom O(1)
350. Intersection of Two Arrays II
347. Top K Frequent Elements
323. Number of Connected Components in an Undirected Graph
322. Coin Change
300. Longest Increasing Subsequence
299. Bulls and Cows
290. Word Pattern
289. Game of Life
283. Move Zeroes
279. Perfect Squares
274. H-Index
273. Integer to English Words
271. Encode and Decode Strings
268. Missing Number
261. Graph Valid Tree
257. Binary Tree Paths
253. Meeting Rooms II

2021

252. Meeting Rooms
242. Valid Anagram
239. Sliding Window Maximum
238. Product of Array Except Self
236. Lowest Common Ancestor of a Binary Tree
235. Lowest Common Ancestor of a Binary Search Tree
234. Palindrome Linked List
232. Implement Queue using Stacks
230. Kth Smallest Element in a BST
228. Summary Ranges
226. Invert Binary Tree
224. Basic Calculator
222. Count Complete Tree Nodes
221. Maximal Square
219. Contains Duplicate II
217. Contains Duplicate
215. Kth Largest Element in an Array
213. House Robber II
212. Word Search II
208. Implement Trie (Prefix Tree)
206. Reverse Linked List
205. Isomorphic Strings
204. Count Primes
202. Happy Number
200. Number of Islands
198. House Robber
189. Rotate Array
188. Best Time to Buy and Sell Stock IV
179. Largest Number
173. Binary Search Tree Iterator
172. Factorial Trailing Zeroes
169. Majority Element
167. Two Sum II - Input Array Is Sorted
155. Min Stack
152. Maximum Product Subarray
151. Reverse Words in a String
150. Evaluate Reverse Polish Notation
149. Max Points on a Line
146. LRU Cache
145. Binary Tree Postorder Traversal
144. Binary Tree Preorder Traversal
143. Reorder List
141. Linked List Cycle
139. Word Break
138. Copy List with Random Pointer
136. Single Number
135. Candy
134. Gas Station
133. Clone Graph
130. Surrounded Regions
129. Sum Root to Leaf Numbers
128. Longest Consecutive Sequence
125. Valid Palindrome
123. Best Time to Buy and Sell Stock III
122. Best Time to Buy and Sell Stock II
121. Best Time to Buy and Sell Stock
120. Triangle
117. Populating Next Right Pointers in Each Node II
116. Populating Next Right Pointers in Each Node
112. Path Sum
110. Balanced Binary Tree
108. Convert Sorted Array to Binary Search Tree
105. Construct Binary Tree from Preorder and Inorder Traversal
104. Maximum Depth of Binary Tree
103. Binary Tree Zigzag Level Order Traversal
102. Binary Tree Level Order Traversal
101. Symmetric Tree

2020

100. Same Tree
98. Validate Binary Search Tree
94. Binary Tree Inorder Traversal
92. Reverse Linked List II
91. Decode Ways
88. Merge Sorted Array
86. Partition List
84. Largest Rectangle in Histogram
83. Remove Duplicates from Sorted List
82. Remove Duplicates from Sorted List II
80. Remove Duplicates from Sorted Array II
79. Word Search
77. Combinations
76. Minimum Window Substring
75. Sort Colors
73. Set Matrix Zeroes
72. Edit Distance
71. Simplify Path
70. Climbing Stairs
68. Text Justification
65. Valid Number
64. Minimum Path Sum
63. Unique Paths II
62. Unique Paths
61. Rotate List
60. Permutation Sequence
58. Length of Last Word
57. Insert Interval
56. Merge Intervals
55. Jump Game
54. Spiral Matrix
53. Maximum Subarray
50. Pow(x, n)
49. Group Anagrams
48. Rotate Image
46. Permutations
45. Jump Game II
42. Trapping Rain Water
41. First Missing Positive
40. Combination Sum II
39. Combination Sum
36. Valid Sudoku
35. Search Insert Position
34. Find First and Last Position of Element in Sorted Array
31. Next Permutation
30. Substring with Concatenation of All Words
28. Find the Index of the First Occurrence in a String
27. Remove Element
26. Remove Duplicates from Sorted Array
25. Reverse Nodes in k-Group
24. Swap Nodes in Pairs
21. Merge Two Sorted Lists
20. Valid Parentheses
19. Remove Nth Node From End of List
16. 3Sum Closest
15. 3Sum
14. Longest Common Prefix
13. Roman to Integer
12. Integer to Roman
11. Container With Most Water
9. Palindrome Number
8. String to Integer (atoi)
7. Reverse Integer
6. Zigzag Conversion
5. Longest Palindromic Substring
3. Longest Substring Without Repeating Characters
2. Add Two Numbers
1. Two Sum

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