JS-LeetCode

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LeetCode 题目全面解析。✍️✍️✍️

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# 前言

> 2019/4/1 起，每天都会做一道 LeetCode 算法题！30天锻炼自己多种解题思路，用心记录每道算法题的收获！

#### 1、练习“站桩”每天要坚持，一天都不能少！

#### 2、练“武”不练“功”，到老一场空

#### 3、内练心智，外练筋骨。

#### 4、再好的功夫，练不好基本功，也会走样！

#### 5、练”武“太急是大忌，”基本功“要稳！

|  题号  |   日期    | 难度 |                           英文地址                           |                           中文地址                           |                          JavaScript                          | Java | Python |
| :----: | :-------: | :--: | :----------------------------------------------------------: | :----------------------------------------------------------: | :----------------------------------------------------------: | :--: | :----: |
|  1 题  | 2019/4/1  | 简单 |      [Two Sum](https://leetcode.com/problems/two-sum/)       |    [两数之和](https://leetcode-cn.com/problems/two-sum/)     | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/TwoSum.md) |      |        |
|  2 题  | 2019/4/2  | 中等 | [Add Sum Numbers](https://leetcode.com/problems/add-two-numbers/) | [两数相加](https://leetcode-cn.com/problems/add-two-numbers/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/AddTwoNumbers.md) |      |        |
| 15 题  | 2019/4/3  | 中等 |         [3Sum](https://leetcode.com/problems/3sum/)          |      [三数之和](https://leetcode-cn.com/problems/3sum/)      | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/3Sum.md) |      |        |
| 169 题 | 2019/4/4  | 简单 | [Majority Element I](https://leetcode.com/problems/majority-element/) | [求众数 I](https://leetcode-cn.com/problems/majority-element/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/MajorityElement1.md) |      |        |
| 229 题 | 2019/4/5  | 中等 | [Majority Element II](https://leetcode.com/problems/majority-element-ii/) | [求众数 II](https://leetcode-cn.com/problems/majority-element-ii/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/MajorityElement2.md) |      |        |
| 41 题  | 2019/4/6  | 困难 | [First Missing Positive](https://leetcode.com/problems/first-missing-positive/) | [缺失的第一个正数](https://leetcode-cn.com/problems/first-missing-positive/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/FirstMissingPositive.md) |      |        |
| 141 题 | 2019/4/7  | 简单 | [Linked List Cycle](https://leetcode.com/problems/linked-list-cycle/) | [环形链表 I](https://leetcode-cn.com/problems/linked-list-cycle/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/LinkedListCycle.md) |      |        |
| 142 题 | 2019/4/8  | 中等 | [Linked List Cycle II](https://leetcode-cn.com/problems/linked-list-cycle-ii/) | [环形链表 II](https://leetcode-cn.com/problems/linked-list-cycle-ii/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/LinkedListCycle2.md) |      |        |
| 21 题  | 2019/4/9  | 简单 | [Merge Two Sorted Lists](https://leetcode-cn.com/problems/merge-two-sorted-lists/) | [合并两个有序链表](https://leetcode-cn.com/problems/merge-two-sorted-lists/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/MergeTwoSortedLists.md) |      |        |
| 23 题  | 2019/4/10 | 困难 | [Merge K Sorted Lists](https://leetcode-cn.com/problems/merge-k-sorted-lists/) | [ 合并K个排序链表](https://leetcode-cn.com/problems/merge-k-sorted-lists/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/MergekSortedLists.md) |      |        |
| 20 题  | 2019/4/11 | 简单 | [Valid Parentheses](https://leetcode-cn.com/problems/valid-parentheses/) | [有效的括号](https://leetcode-cn.com/problems/valid-parentheses/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/ValidParentheses.md) |      |        |
| 70 题  | 2019/4/12 | 简单 | [Climbing Stairs](https://leetcode-cn.com/problems/climbing-stairs/) | [爬楼梯](https://leetcode-cn.com/problems/climbing-stairs/)  | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/ClimbingStairs.md) |      |        |
| 32 题  | 2019/4/13 | 困难 | [Longest Valid Parentheses](https://leetcode-cn.com/problems/longest-valid-parentheses/) | [最长有效括号](https://leetcode-cn.com/problems/longest-valid-parentheses/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/LongestVaildParentheses.md) |      |        |
| 150 题 | 2019/4/14 | 中等 | [ Evaluate Reverse Polish Notation](https://leetcode-cn.com/problems/evaluate-reverse-polish-notation/) | [逆波兰表达式求值](https://leetcode-cn.com/problems/evaluate-reverse-polish-notation/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/EvaluateReversePolishNotation.md) |      |        |
| 641 题 | 2019/4/15 | 中等 | [Design Circular Deque](https://leetcode-cn.com/problems/design-circular-deque/) | [设计循环双端队列](https://leetcode-cn.com/problems/design-circular-deque/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/DesignCircularDeque.md) |      |        |
| 239 题 | 2019/4/16 | 困难 | [Sliding Window Maximum](https://leetcode-cn.com/problems/sliding-window-maximum/) | [滑动窗口最大值](https://leetcode-cn.com/problems/sliding-window-maximum/) | [题目解析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/SlidingWindowMaximum.md) |      |        |
| 69 题  | 2019/4/17 | 简单 |      [Sqrt(x)](https://leetcode-cn.com/problems/sqrtx/)      |    [x 的平方根](https://leetcode-cn.com/problems/sqrtx/)     | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/sqrtx.md) |      |        |
| 344 题 | 2019/4/18 | 简单 | [Reverse String](https://leetcode-cn.com/problems/reverse-string/) | [反转字符串](https://leetcode-cn.com/problems/reverse-string/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/ReverseString.md) |      |        |
|  8 题  | 2019/4/19 | 中等 | [String to Integer (atoi)](https://leetcode-cn.com/problems/string-to-integer-atoi/) | [字符串转换整数 (atoi)](https://leetcode-cn.com/problems/string-to-integer-atoi/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/StringToInteger.md) |      |        |
| 151 题 | 2019/4/20 | 中等 | [Reverse Words in a String](https://leetcode-cn.com/problems/reverse-words-in-a-string/) | [翻转字符串里的单词](https://leetcode-cn.com/problems/reverse-words-in-a-string/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/ReverseWordsInaString.md) |      |        |
| 226 题 | 2019/4/21 | 简单 | [Invert Binary Tree](https://leetcode-cn.com/problems/invert-binary-tree/) | [翻转二叉树](https://leetcode-cn.com/problems/invert-binary-tree/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/InvertBinaryTree.md) |      |        |
| 104题  | 2019/4/22 | 简单 | [Maximum Depth of Binary Tree](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/) | [二叉树的最大深度](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/MaximumDepthofBinaryTree.md) |      |        |
| 206题  | 2019/4/23 | 简单 | [Reverse Linked List](https://leetcode-cn.com/problems/reverse-linked-list/) | [反转链表](https://leetcode-cn.com/problems/reverse-linked-list/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/ReverseLinkedList.md) |      |        |
| 98 题  | 2019/4/24 | 中等 | [Validate Binary Search Tree](https://leetcode-cn.com/problems/validate-binary-search-tree/) | [验证二叉搜索树](https://leetcode-cn.com/problems/validate-binary-search-tree/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/VaildataBinarySearchTree.md) |      |        |
| 94 题  | 2019/4/25 | 中等 | [Binary Tree Inorder Traversal](https://leetcode-cn.com/problems/binary-tree-inorder-traversal/) | [二叉树的中序遍历](https://leetcode-cn.com/problems/binary-tree-inorder-traversal/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/BinaryTreeInorderTraversal.md) |      |        |
| 112 题 | 2019/4/26 | 简单 |    [Path Sum](https://leetcode-cn.com/problems/path-sum/)    |    [路径总和](https://leetcode-cn.com/problems/path-sum/)    | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/PathSum.md) |      |        |
| 783 题 | 2019/4/27 | 简单 | [Minimum Distance Between BST Nodes](https://leetcode-cn.com/problems/minimum-distance-between-bst-nodes/) | [二叉搜索树结点最小距离](https://leetcode-cn.com/problems/minimum-distance-between-bst-nodes/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/MinimumDistanceBetweenBSTNodes.md) |      |        |
| 200 题 | 2019/4/28 | 中等 | [Number of Islands](https://leetcode-cn.com/problems/number-of-islands/) | [岛屿的个数](https://leetcode-cn.com/problems/number-of-islands/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/NumberofIslands.md) |      |        |
| 36 题  | 2019/4/29 | 中等 | [Valid Sudoku](https://leetcode-cn.com/problems/valid-sudoku/) | [有效的数独](https://leetcode-cn.com/problems/valid-sudoku/) | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/VaildSudoku.md) |      |        |
| 46 题  | 2019/4/30 | 中等 | [Permutations](https://leetcode-cn.com/problems/permutations/) |   [全排列](https://leetcode-cn.com/problems/permutations/)   | [题目分析](https://github.com/luxiangqiang/JS-LeetCode/blob/master/Permutations.md) |      |        |

## 后记

通过一个月的 LeedCode 算法题的记录，逐渐的发现有几个特别重要且难理解的几个算法和数据结构，所以接下来的一个月主攻这几部分，比如：递归、回溯算法、贪心算法以及动态规划等。

在网上看了很多博客，发现很多都是懵懵懂懂，即使写文章的人很明白，但是那种让读者看起来非常懵懵的文章占大多数的。我自己在查找这方面文章时，也走了很多坑，所以呢，根据以前做过的题，将其综合起来进行分析，通过深层的理解，将最初的、基本的算法思想能够简单易懂的写出来分享给每个人，对我这个渣渣来说，也是挺有难度的，那就尝试的去努力做吧。

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