algorithm_practice

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Introduction
Data Structure
258. Add Digits
235. Lowest Common Ancestor of a Binary Search Tree
Quick Sort & Merge Sort
215. Kth Largest Element in an Array
912. Sort an Array
409. Longest Palindrome
125. Valid Palindrome
702. Concatenated String with Uncommon Characters of Two Strings
513. Find Bottom Left Tree Value
333. Largest BST SubtreeUntitled
567. Permutation in String
756. Multiply Two Numbers
139. Word Break
120. Triangle
683. Word Break III
1332. Number of 1 Bits
844. Number Pair Statistics
438. Find All Anagrams in a String
30. Substring with Concatenation of All Words
762. Prime Number of Set Bits in Binary Representation
89. Gray Code
535. Encode and Decode TinyURL
155. Min Stack
Combination & Permutation
- 31. Next Permutation
- 60. Permutation Sequence
Tree
Array
- 238. Product of Array Except Self
- 59. Spiral Matrix II
Stack
- 739. Daily Temperatures
- 503. Next Greater Element II
Hash Table
Connectivity
Design
- 1472. Design Browser History
Sort
- 973. K Closest Points to Origin
- 1268. Search Suggestions System
DFS
- 1192. Critical Connections in a Network
- 1466. Reorder Routes to Make All Paths Lead to the City Zero
BFS
Binary Search | Divide & Conquer
- 4. Median of Two Sorted Arrays
- 240. Search a 2D Matrix II
Two Pointers
Sliding Window
Recursive & DP
Greedy & Heap
151. Reverse Words in a String
387. First Unique Character in a String
189. Rotate Array
1442. Count Triplets That Can Form Two Arrays of Equal XOR
459. Repeated Substring Pattern
836. Rectangle Overlap
682. Baseball Game
1730. Spreadsheet Notation Conversion
273. Integer to English Words
202. Happy Number
171. Excel Sheet Column Number
819. Most Common Word
414. Third Maximum Number
556. Next Greater Element III
21. Merge Two Sorted Lists
23. Merge k Sorted Lists
763. Partition Labels
26. Remove Duplicates from Sorted Array
11. Container With Most Water
141. Linked List Cycle
15. 3Sum
42. Trapping Rain Water
16. 3Sum Closest
149. Max Points on a Line
108. Convert Sorted Array to Binary Search Tree
109. Convert Sorted List to Binary Search Tree
394. Decode String
100. Same Tree
105. Construct Binary Tree from Preorder and Inorder Traversal
106. Construct Binary Tree from Inorder and Postorder Traversal
979. Distribute Coins in Binary Tree
101. Symmetric Tree
695. Max Area of Island
206. Reverse Linked List
92. Reverse Linked List II
430. Flatten a Multilevel Doubly Linked List
232. Implement Queue using Stacks
237. Delete Node in a Linked List
146. LRU Cache
144. Binary Tree Preorder Traversal
94. Binary Tree Inorder Traversal
145. Binary Tree Postorder Traversal
443. String Compression
167. Two Sum II - Input array is sorted
653. Two Sum IV - Input is a BST
2. Add Two Numbers
43. Multiply Strings
322. Coin Change
518. Coin Change 2
49. Group Anagrams
162. Find Peak Element
852. Peak Index in a Mountain Array
9. Palindrome Number
114. Flatten Binary Tree to Linked List
20. Valid Parentheses
450. Delete Node in a BST
6. ZigZag Conversion
5. Longest Palindromic Substring
582. Kill Process
797. All Paths From Source to Target
723. Candy Crush
1396. Design Underground System
1169. Invalid Transactions
253. Meeting Rooms II
429. N-ary Tree Level Order Traversal
1530. Number of Good Leaf Nodes Pairs
987. Vertical Order Traversal of a Binary Tree
33. Search in Rotated Sorted Array
50. Pow(x, n)
121. Best Time to Buy and Sell Stock
12. Integer to Roman
283. Move Zeroes
346. Moving Average from Data Stream
88. Merge Sorted Array
301. Remove Invalid Parentheses
486. Merge K Sorted Arrays
362. Design Hit Counter
99. Recover Binary Search Tree
425. Word Squares
91. Decode Ways
583. Delete Operation for Two Strings
460. LFU Cache
300. Longest Increasing Subsequence
1047. Remove All Adjacent Duplicates In String
1209. Remove All Adjacent Duplicates in String II
332. Reconstruct Itinerary
445. Add Two Numbers II
1249. Minimum Remove to Make Valid Parentheses
921. Minimum Add to Make Parentheses Valid
1029. Two City Scheduling
41. First Missing Positive
694. Number of Distinct Islands
140. Word Break II
1155. Number of Dice Rolls With Target Sum
384. Shuffle an Array
1300. Sum of Mutated Array Closest to Target
700. Search in a Binary Search Tree
701. Insert into a Binary Search Tree
977. Squares of a Sorted Array
366. Find Leaves of Binary Tree
1123. LCA of Deepest Leaves
220. Contains Duplicate III
968. Binary Tree Cameras
257. Binary Tree Paths
124. Binary Tree Maximum Path Sum
160. Intersection of Two Linked Lists
543. Diameter of Binary Tree
1606. Find Servers That Handled Most Number of Requests
1095. Find in Mountain Array
98. Validate Binary Search Tree
380. Insert Delete GetRandom O(1)
64. Minimum Path Sum
78. Subsets
1539. Kth Missing Positive Number
470. Implement Rand10() Using Rand7()
236. Lowest Common Ancestor of a Binary Tree
1012. Numbers With Repeated Digits
122. Best Time to Buy and Sell Stock II
123. Best Time to Buy and Sell Stock III
188. Best Time to Buy and Sell Stock IV
70. Climbing Stairs
210. Course Schedule II
56. Merge Intervals
621. Task Scheduler
1244. Design A Leaderboard
269. Alien Dictionary
Methodology Summary
74. Search a 2D Matrix
153. Find Minimum in Rotated Sorted Array
154. Find Minimum in Rotated Sorted Array II
4. Median of Two Sorted Arrays
82. Remove Duplicates from Sorted List II
86. Partition List
110. Balanced Binary Tree
530. Minimum Absolute Difference in BST
173. Binary Search Tree Iterator

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Recursive & DP

力扣上的 DP 问题分类汇总：

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Last updated 5 years ago

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