README

Leetcode Summary

Author: Jelly.

If this repo helps you, please give it a 🌟. Thanks.

Gitbook link:https://zhangjelly0405.gitbook.io/leetcode/

Github link:https://github.com/JellyZhang/leetcode

Important Questions

#	Title	Importance
Array
4	Median of Two Sorted Arrays	★★★★★
11	Container With Most Water	★★★
15	3Sum	★★★★★
81	Search in Rotated Sorted Array II	★★★★★
41	First Missing Positive	★★★★★
42	Trapping Rain Water	★★★★★
56	Merge Intervals	★★★★★
60	Permutation Sequence	★★★
154	Find Minimum in Rotated Sorted Array II	★★★★
215	Kth Largest Element in an Array	★★★★★
315	Count of Smaller Numbers After Self	★★★
188	Best Time to Buy and Sell Stock IV	★★★★★
862	Shortest Subarray with Sum at Least K	★★★★★
51	Maximum Subarray	★★★★★
300	Longest Increasing Subsequence	★★★★★
43	Multiply Strings	★★★★
String
3	Longest Substring Without Repeating Characters	★★★
5	Longest Palindromic Substring	★★★
8	String to Integer (atoi)	★★★★
28	Implement strStr()	★★★★★
32	Longest Valid Parentheses
LinkList
2	Add Two Numbers	★★★
23	Merge k Sorted Lists	★★★
25	Reverse Nodes in k-Group	★★★★★
142	Linked List Cycle II	★★★
143	Reorder List	★★★★
Tree
230	Kth Smallest Element in a BST	★★
98	Validate Binary Search Tree	★★★
102	Binary Tree Level Order Traversal	★★★
94	Binary Tree Inorder Traversal	★★★★★
144	Binary Tree Preorder Traversal	★★★★★
145	Binary Tree Postorder Traversal	★★★★★
236	Lowest Common Ancestor of a Binary Tree	★★★
DP
10	Regular Expression Matching	★★★★
44	Wildcard Matching	★★★★
72	Edit Distance	★★★★
132	Palindrome Partitioning II	★★★
338	Counting Bits	★★★
877	Stone Game	★★★★
1043	Partition Array for Maximum Sum	★★★
1406	Stone Game III	★★★★
416	Partition Equal Subset Sum	★★★★
DFS/BFS
40	Combination Sum II	★★★
31	Next Permutation	★★★★★
47	Permutations II	★★★★
131	Palindrome Partitioning	★★
Bit Operation
371	Sum of Two Integers	★★
Others
29	Divide Two Integers	★★★
50	Pow(x, n)	★★★
69	Sqrt(x)	★★★
133	Clone Graph	★★★
969	Pancake Sorting	★★★
224	Basic Calculator	★★★★
547	Friend Circles	★★★★
146	LRU Cache	★★★★