LeetCode of the Day

01/03

• Find first unique number in data stream II ---Heap

01/04

• Find all anagrams in a string ---- sliding window

• Subarray Sum Equals K ----以为是sliding window, 实则是2 sum变种

01/05

• Heap Top K Frequent Elements ---- bucket sort solution

• Kth Smallest Element in a Sorted Matrix ---- binary search solution

01/9

• Longest Consecutive Sequence -- union find, 和set 做法

01/01

• 5.Longest Palindromic Substring

• 1.3 Sum

01/05

• 20.Valid Parentheses

• 25.Reverse Nodes in K-Group(iterative/recursive)

01/07

• 82.Remove Duplicates from Sorted List II

01/15

• LRU Cache

• Basic Calculator

01/21

• Subarray Sum系列 Kadane Algorithm

01/22

• Min Cost Climbing Stairs(经典DP入门)

• Convert Sorted List to Binary Search Tree

01/30

• Triangle II

• Balanced Binary Tree

02/05

• Validate BST

06/25

• 255.Verify Preorder Sequence in BST(好题，必刷)

• 333 Largest BST Subtree

07/23

• Delete Node in BST

• Split BST

07/24

• Flatten Nested List Iterator

07/25

• All Nodes Distance K in Binary Tree