the notes and answers of leetcode practice

• Array，Hash Table，Linked List，Tree，Two Pointers，String，Binary Search，Greedy，Queue，Heap，Stack

• Graph，Breadth-first Search，Depth-first Search，Sort，Backtracking，Recursion/Dynamic Programming/Memoization，Divide and Conquer，Binary Search Tree

• Union Find，Topologial Sort，Trie，Binary Indexed Tree，Segment Tree，Minimax