README.md

# 介绍
leetcode题解，记录自己的leecode解题之路。

## 传送门
### 简单难度
- [20. Valid Parentheses](https://github.com/azl397985856/leetcode/blob/master/validParentheses.md)
- [26.remove-duplicates-from-sorted-array](https://github.com/azl397985856/leetcode/blob/master/26.remove-duplicates-from-sorted-array.md)
- [206.reverse-linked-list](./206.reverse-linked-list.md)
- [136.single-number](./136.single-number.md)
- [167.two-sum-ii-input-array-is-sorted](./167.two-sum-ii-input-array-is-sorted.md)

### 中等难度
- [2. Add Two Numbers](https://github.com/azl397985856/leetcode/blob/master/addTwoNumbers.md)
- [3. Longest Substring Without Repeating Characters](https://github.com/azl397985856/leetcode/blob/master/longestSubstringWithoutRepeatingCharacters.md)
- [5. Longest Palindromic Substring](https://github.com/azl397985856/leetcode/blob/master/longestPalindromicSubstring.md)
- [19. Remove Nth Node From End of List](https://github.com/azl397985856/leetcode/blob/master/removeNthNodeFromEndofList.md)
- [24. Swap Nodes In Pairs](https://github.com/azl397985856/leetcode/blob/master/swapNodesInPairs.md)
- [75.sort-colors.md](https://github.com/azl397985856/leetcode/blob/master/75.sort-colors.md)
- [86.partition-list](./86.partition-list.md)
- [92.reverse-linked-list-ii](./92.reverse-linked-list-ii.md)
- [94.binary-tree-inorder-traversal](./94.binary-tree-inorder-traversal.md)
- [102.binary-tree-level-order-traversal](./102.binary-tree-level-order-traversal.md)
- [103.binary-tree-zigzag-level-order-traversal](./103.binary-tree-zigzag-level-order-traversal.md)
- [144.binary-tree-preorder-traversal](./144.binary-tree-preorder-traversal.md)
### 高级难度

- [145.binary-tree-postorder-traversal](./145.binary-tree-postorder-traversal.md)