先定一个小目标: LC500题

一年前刷了LC 100左右。
基本全部忘光。
现在从头刷，目前刷了83。
第一次参加contest， 只刷对了一题。
希望坚持早日刷到500， contest 4题全过。
每日至少3题 + 总结。

N-ary Tree Postorder Traversal  
N-ary Tree Preorder Traversal  
Maximum Depth of N-ary Tree   

刷旧题
5. Longest Palindromic Substring
6. ZigZag Conversion
7. Reverse Integer
8. String to Integer (atoi)
9. Palindrome Number

Integer to Roman
String to Integer (atoi)
ZigZag ConversionGenerate Parentheses
Generate Parentheses

Third Maximum Number
Two Sum II - Input array is sorted
Contains Duplicate II

补充内容 (2019-7-23 06:04):
Fibonacci Number

Unique Morse Code Words
To Lower Case
Defanging an IP Address

补充内容 (2019-7-24 04:06):
Unique Email Addresses

前几天准备面试。没有刷。希望能等到offer

Flipping an Image
Sort Array By Parity
Squares of a Sorted Array

Height checker
Relative Sort Array
Sort Array By Parity II

Symmetric tree
Same tree
Remove duplicate from sorted list
climbing stairs

Binary Tree Level Order Traversal II
Convert Sorted Array to Binary Search Tree
Balanced Binary Tree

加油加油