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23.合并K个排序链表
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32.最长有效括号
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94.二叉树的中序遍历
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💚Easy🎈
- 1. Two Sum
- 26. Remove Duplicates from Sorted Array
- 27. Remove Element
- 35. Search Insert Position
- 53. Maximum Subarray
- 66. Plus One
- 88. Merge Sorted Array
- 118. Pascal's Triangle
- 119. Pascal's Triangle II
- 121. Best Time to Buy and Sell Stock
- 122. Best Time to Buy and Sell Stock II
- 167. Two Sum II - Input array is sorted
- 169. Majority Element
- 189. Rotate Array
- 217. Contains Duplicate
- 219. Contains Duplicate II
- 268. Missing Number
- 283. Move Zeroes
- 414. Third Maximum Number
- 448. Find All Numbers Disappeared in an Array
- 485. Max Consecutive Ones
- 509. Fibonacci Number
- 532. K-diff Pairs in an Array
- 561. Array Partition I
- 566. Reshape the Matrix
- 581. Shortest Unsorted Continuous Subarray
- 605. Can Place Flowers
- 628. Maximum Product of Three Numbers
- 643. Maximum Average Subarray I
- 661. Image Smoother
- 665. Non-decreasing Array
- 674. Longest Continuous Increasing Subsequence
- 695. Max Area of Island
- 697. Degree of an Array
- 717. 1-bit and 2-bit Characters
- 724. Find Pivot Index
- 746. Min Cost Climbing Stairs(DP)
- 747. Largest Number At Least Twice of Others
- 766. Toeplitz Matrix
- 771. Jewels and Stones
- 830. Positions of Large Groups
- 832. Flipping an Image
- 840. Magic Squares In Grid
- 849. Maximize Distance to Closest Person
- 867. Transpose Matrix
- 888. Fair Candy Swap
- 905. Sort Array By Parity
- 922. Sort Array By Parity II
- 977. Squares of a Sorted Array
- 1266. Minimum Time Visiting All Points
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🧡Medium🎈
- 11. Container With Most Water
- 15. 3Sum
- 16. 3Sum Closest
- 18. 4Sum
- 31. Next Permutation
- 33. Search in Rotated Sorted Array
- 34. Find First and Last Position of Element in Sorted Array
- 39. Combination Sum
- 40. Combination Sum II
- 48. Rotate Image
- 54. Spiral Matrix
- 55. Jump Game
- 56. Merge Intervals.java
- 59. Spiral Matrix II
- 62. Unique Paths
- 63. Unique Paths II
- 64. Minimum Path Sum
- 73. Set Matrix Zeroes
- 74. Search a 2D Matrix
- 78. Subsets
- 79. Word Search
- 80. Remove Duplicates from Sorted Array II
- 81. Search in Rotated Sorted Array II
- 90. Subsets II
- 105. Construct Binary Tree from Preorder and Inorder Traversal
- 106. Construct Binary Tree from Inorder and Postorder Traversal
- 120. Triangle
- 152. Maximum Product Subarray
- 153. Find Minimum in Rotated Sorted Array
- 209. Minimum Size Subarray Sum
- 216. Combination Sum III
- 229. Majority Element II
- 238. Product of Array Except Self
- 287. Find the Duplicate Number
- 289. Game of Life
- 380. Insert Delete GetRandom O(1)
- 442. Find All Duplicates in an Array
- 495. Teemo Attacking
- 560. Subarray Sum Equals K
- 565. Array Nesting
- 611. Valid Triangle Number
- 621. Task Scheduler
- 667. Beautiful Arrangement II
- 670. Maximum Swap
- 713. Subarray Product Less Than K
- 714. Best Time to Buy and Sell Stock with Transaction Fee
- 718. Maximum Length of Repeated Subarray
- 729. My Calendar I
- 769. Max Chunks To Make Sorted
- 792. Number of Matching Subsequences
- 795. Number of Subarrays with Bounded Maximum
- 873. Length of Longest Fibonacci Subsequence
- 907. Sum of Subarray Minimums
- 915. Partition Array into Disjoint Intervals
- 918. Maximum Sum Circular Subarray
- 926. Flip String to Monotone Increasing
- 945. Minimum Increment to Make Array Unique
- 950. Reveal Cards In Increasing Order
- 954. Array of Doubled Pairs
- 969. Pancake Sorting
- 974. Subarray Sums Divisible by K
- 978. Longest Turbulent Subarray
- 1011. Capacity To Ship Packages Within D Days
- 1014. Best Sightseeing Pair
- 1031. Maximum Sum of Two Non-Overlapping Subarrays
- 1035. Uncrossed Lines
- 1052. Grumpy Bookstore Owner
- 1109. Corporate Flight Bookings
- 1146. Snapshot Array
- 1208. Get Equal Substrings Within Budget
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💙Hard🎈
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💚Easy🎈
- 13. Roman to Integer
- 14. Longest Common Prefix
- 20. Valid Parentheses
- 67. Add Binary
- 344. Reverse String
- 383. Ransom Note
- 387. First Unique Character in a String
- 415. Add Strings
- 520. Detect Capital
- 521. Longest Uncommon Subsequence I
- 557. Reverse Words in a String III
- 606. Construct String from Binary Tree
- 657. Judge Route Circle
- 696. Count Binary Substrings
- 788. Rotated Digits
- 819. Most Common Word
- 824. Goat Latin
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🧡Medium🎈