🔥 LeetCode (力扣) Top 100 Liked Questions

◎ The questions that are also listed in the Top Interview are marked with『🔝 』.

#	Title	Solution	Diffuiculty	Category	Topics
1.🔝	Two Sum	Java / Go / JS / C#	Easy	Algorithms	Array / Hash Table
2.🔝	Add Two Numbers	Go / Java / JS / C#	Medium	Algorithms	Linked List / Math / Recursion
3.🔝	Longest Substring Without Repeating Characters	Go / Java / JS / C#	Medium	Algorithms	Hash Table / Two Pointers / String / Sliding Window
4.🔝	Median of Two Sorted Arrays	Java / JS	Hard	Algorithms	Array / Binary Search / Divide and Conquer
5.🔝	Longest Palindromic Substring	Java	Medium	Algorithms	String / Dynamic Programming
10.🔝	Regular Expression Matching	Java	Hard	Algorithms	String / Dynamic Programming / Backtracking
11.🔝	Container With Most Water	Java	Medium	Algorithms	Array / Two Pointers
15.🔝	3Sum		Medium	Algorithms	Array / Two Pointers
17.🔝	Letter Combinations of a Phone Number		Medium	Algorithms	String / Backtracking / Depth-first Search / Recursion
19.🔝	Remove Nth Node From End of List		Medium	Algorithms	Linked List / Two Pointers
20.🔝	Valid Parentheses	Go / JS / C#	Easy	Algorithms	String / Stack
21.🔝	Merge Two Sorted Lists	Go / JS / C#	Easy	Algorithms	Linked List / Recursion
22.🔝	Generate Parentheses		Medium	Algorithms	String / Backtracking
23.🔝	Merge k Sorted Lists		Hard	Algorithms	Linked List / Divide and Conquer / Heap
32.	Longest Valid Parentheses		Hard	Algorithms	String / Dynamic Programming
33.🔝	Search in Rotated Sorted Array		Medium	Algorithms	Array / Binary Search
34.🔝	Find First and Last Position of Element in Sorted Array		Medium	Algorithms	Array / Binary Search
39.	Combination Sum		Medium	Algorithms	Array / Backtracking
41.🔝	First Missing Positive		Hard	Algorithms	Array
42.🔝	Trapping Rain Water		Hard	Algorithms	Array / Two Pointers / Dynamic Programming / Stack
45.	Jump Game II		Hard	Algorithms	Array / Greedy
46.🔝	Permutations		Medium	Algorithms	Backtracking
48.🔝	Rotate Image		Medium	Algorithms	Array
49.🔝	Group Anagrams		Medium	Algorithms	Hash Table / String
53.🔝	Maximum Subarray	C# / Go	Easy	Algorithms	Array / Divide and Conquer / Dynamic Programming
55.🔝	Jump Game		Medium	Algorithms	Array / Greedy
56.🔝	Merge Intervals		Medium	Algorithms	Array / Sort
62.🔝	Unique Paths		Medium	Algorithms	Array / Dynamic Programming
64.	Minimum Path Sum		Medium	Algorithms	Array / Dynamic Programming
70.🔝	Climbing Stairs	C# / Go	Easy	Algorithms	Dynamic Programming
72.	Edit Distance		Hard	Algorithms	String / Dynamic Programming
75.🔝	Sort Colors		Medium	Algorithms	Array / Two Pointers / Sort
76.🔝	Minimum Window Substring		Hard	Algorithms	Hash Table / Two Pointers / String / Sliding Window
78.🔝	Subsets		Medium	Algorithms	Array / Backtracking / Bit Manipulation
79.🔝	Word Search		Medium	Algorithms	Array / Backtracking
84.🔝	Largest Rectangle in Histogram		Hard	Algorithms	Array / Stack
85.	Maximal Rectangle		Hard	Algorithms	Array / Hash Table / Dynamic Programming / Stack
94.🔝	Binary Tree Inorder Traversal		Medium	Algorithms	Hash Table / Stack / Tree
96.	Unique Binary Search Trees		Medium	Algorithms	Dynamic Programming / Tree
98.🔝	Validate Binary Search Tree		Medium	Algorithms	Tree / Depth-first Search / Recursion
101.🔝	Symmetric Tree	C# / Go	Easy	Algorithms	Tree / Depth-first Search / Breadth-first Search
102.🔝	Binary Tree Level Order Traversal		Medium	Algorithms	Tree / Breadth-first Search
104.🔝	Maximum Depth of Binary Tree	C# / Go	Easy	Algorithms	Tree / Depth-first Search / Recursion
105.🔝	Construct Binary Tree from Preorder and Inorder Traversal		Medium	Algorithms	Array / Tree / Depth-first Search
114.	Flatten Binary Tree to Linked List		Medium	Algorithms	Tree / Depth-first Search
121.🔝	Best Time to Buy and Sell Stock	C# / Go	Easy	Algorithms	Array / Dynamic Programming
124.🔝	Binary Tree Maximum Path Sum		Hard	Algorithms	Tree / Depth-first Search / Recursion
128.🔝	Longest Consecutive Sequence		Hard	Algorithms	Array / Union Find
136.🔝	Single Number	C# / Go	Easy	Algorithms	Hash Table / Bit Manipulation
138.🔝	Copy List with Random Pointer		Medium	Algorithms	Hash Table / Linked List
139.🔝	Word Break		Medium	Algorithms	Dynamic Programming
141.🔝	Linked List Cycle	C# / Go	Easy	Algorithms	Linked List / Two Pointers
142.	Linked List Cycle II		Medium	Algorithms	Linked List / Two Pointers
146.🔝	LRU Cache		Medium	Algorithms	Design
148.🔝	Sort List		Medium	Algorithms	Linked List / Sort
152.🔝	Maximum Product Subarray		Medium	Algorithms	Array / Dynamic Programming
155.🔝	Min Stack	C# / Go	Easy	Algorithms	Stack / Design
160.🔝	Intersection of Two Linked Lists	C# / Go	Easy	Algorithms	Linked List
169.🔝	Majority Element	C# / Go	Easy	Algorithms	Array / Divide and Conquer / Bit Manipulation
198.🔝	House Robber		Medium	Algorithms	Dynamic Programming
200.🔝	Number of Islands		Medium	Algorithms	Depth-first Search / Breadth-first Search / Union Find
206.🔝	Reverse Linked List	C# / Go	Easy	Algorithms	Linked List
207.🔝	Course Schedule		Medium	Algorithms	Depth-first Search / Breadth-first Search / Graph / Topological Sort
208.🔝	Implement Trie (Prefix Tree)		Medium	Algorithms	Design / Trie
215.🔝	Kth Largest Element in an Array		Medium	Algorithms	Divide and Conquer / Heap
221.	Maximal Square		Medium	Algorithms	Dynamic Programming
226.	Invert Binary Tree	C# / Go	Easy	Algorithms	Tree
230.🔝	Kth Smallest Element in a BST		Medium	Algorithms	Binary Search / Tree
234.🔝	Palindrome Linked List	C# / Go	Easy	Algorithms	Linked List / Two Pointers
236.🔝	Lowest Common Ancestor of a Binary Tree		Medium	Algorithms	Tree
238.🔝	Product of Array Except Self		Medium	Algorithms	Array
239.🔝	Sliding Window Maximum		Hard	Algorithms	Heap / Sliding Window / Dequeue
240.🔝	Search a 2D Matrix II		Medium	Algorithms	Binary Search / Divide and Conquer
253.🔝	Meeting Rooms II 🔒	-	Medium	-	-
279.🔝	Perfect Squares		Medium	Algorithms	Math / Dynamic Programming / Breadth-first Search
283.🔝	Move Zeroes	C# / Go	Easy	Algorithms	Array / Two Pointers
287.🔝	Find the Duplicate Number		Medium	Algorithms	Array / Two Pointers / Binary Search
295.🔝	Find Median from Data Stream		Hard	Algorithms	Heap / Design
297.🔝	Serialize and Deserialize Binary Tree		Hard	Algorithms	Tree / Design
300.🔝	Longest Increasing Subsequence		Medium	Algorithms	Binary Search / Dynamic Programming
309.	Best Time to Buy and Sell Stock with Cooldown		Medium	Algorithms	Dynamic Programmin
322.🔝	Coin Change		Medium	Algorithms	Dynamic Programming
337.	House Robber III		Medium	Algorithms	Dynamic Programming / Tree / Depth-first Search
338.	Counting Bits		Medium	Algorithms	Dynamic Programming / Bit Manipulation
347.🔝	Top K Frequent Elements		Medium	Algorithms	Hash Table / Heap
394.	Decode String		Medium	Algorithms	Stack / Depth-first Search
406.	Queue Reconstruction by Height		Medium	Algorithms	Greedy
416.	Partition Equal Subset Sum		Medium	Algorithms	Dynamic Programming
437.	Path Sum III		Medium	Algorithms	Tree
438.	Find All Anagrams in a String		Medium	Algorithms	Hash Table
448.	Find All Numbers Disappeared in an Array	C# / Go	Easy	Algorithms	Array
494.	Target Sum		Medium	Algorithms	Dynamic Programming / Depth-first Search
543.	Diameter of Binary Tree	C# / Go	Easy	Algorithms	Tree
560.	Subarray Sum Equals K		Medium	Algorithms	Array / Hash Table
581.	Shortest Unsorted Continuous Subarray		Medium	Algorithms	Array
617.	Merge Two Binary Trees	C# / Go	Easy	Algorithms	Tree
621.	Task Scheduler		Medium	Algorithms	Array / Greedy / Queue
647.	Palindromic Substrings		Medium	Algorithms	String / Dynamic Programming
739.	Daily Temperatures		Medium	Algorithms	Hash Table / Stack
763.	Partition Labels		Medium	Algorithms	Two Pointers / Greedy