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3 | 3 | [](https://996.icu) |
4 | 4 |
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5 | 5 | ## 说明 |
6 | | -- leetcode练习，坚持每天一道，目前已完成165道 |
| 6 | +- leetcode练习，坚持每天一道，目前已完成166道 |
7 | 7 | - 解题语言是Java |
8 | 8 | - 每道题都是可编译运行的 |
9 | 9 | - 每道题有自己的方法和他人优秀解法 |
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16 | 16 | 回溯算法 |
17 | 17 |
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18 | 18 | - [x] [39. 组合总和 - Medium](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_39_combinationSum.java) |
| 19 | +- [x] [46. 全排列 - Medium](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_46_permute.java) |
| 20 | +- [x] [47. 全排列 II - Medium](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_47_permuteUnique.java) |
| 21 | +- [x] [52. N皇后 II - Hard](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_52_totalNQueens.java) |
| 22 | +- [x] [77. 组合 - Medium](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_77_combine.java) |
19 | 23 |
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20 | | -- [x] [46. 全排列 - Medium](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_46_permute.java) |
21 | | - |
22 | | -- [x] [47. 全排列 II - Medium](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_47_permuteUnique.java) |
23 | | - |
24 | | -- [x] [52. N皇后 II - Hard](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_52_totalNQueens.java) |
25 | | - |
26 | | -- [ ] [77. 组合 - Medium](https://leetcode-cn.com/problems/combinations/) |
| 24 | +后面开始扫题，从LeetCode后面题目开始 |
27 | 25 |
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28 | 26 | ## 已解题目 |
29 | 27 |
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58 | 56 | - [线段树](https://leetcode-cn.com/tag/segment-tree/)（9） |
59 | 57 | - [二叉搜索树](https://leetcode-cn.com/tag/binary-search-tree/)（15） |
60 | 58 |
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61 | | -### 题目列表（更新中--已完成165） |
| 59 | +### 题目列表（更新中--已完成166） |
62 | 60 |
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63 | 61 | [Leetcode-Java(更多题解，持续更新)](https://github.com/pphdsny/Leetcode-Java) |
64 | 62 |
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126 | 124 | | #71 | [简化路径](https://leetcode-cn.com/problems/simplify-path/) | [SimplifyPath](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_71_simplifyPath.java) | [栈](https://leetcode-cn.com/tag/stack/)、[字符串](<https://leetcode-cn.com/tag/string/>) | Medium | | |
127 | 125 | | #72 | [编辑距离](https://leetcode-cn.com/problems/edit-distance/) | [MinDistance](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_72_minDistance.java) | [字符串](<https://leetcode-cn.com/tag/string/>)、[动态规划](<https://leetcode-cn.com/tag/dynamic-programming/>) | Hard | | |
128 | 126 | | #76 | [最小覆盖子串](https://leetcode-cn.com/problems/minimum-window-substring/) | [MinWindow](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_76_minWindow.java) | [哈希表](<https://leetcode-cn.com/tag/hash-table/>)、[双指针](<https://leetcode-cn.com/tag/two-pointers/>)、[字符串](<https://leetcode-cn.com/tag/string/>)、[sliding window](<https://leetcode-cn.com/tag/sliding-window/>) | Hard | | |
| 127 | +| #77 | [组合](https://leetcode-cn.com/problems/combinations/) | [Combine](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_77_combine.java) | [回溯算法](<https://leetcode-cn.com/tag/backtracking/>) | Medium | | |
129 | 128 | | #78 | [子集](https://leetcode-cn.com/problems/subsets/) | [Subsets](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_78_subsets.java) | [位运算](https://leetcode-cn.com/tag/bit-manipulation/)、[数组](<https://leetcode-cn.com/tag/array/>)、[回溯算法](<https://leetcode-cn.com/tag/backtracking/>) | Medium | | |
130 | 129 | | #80 | [删除排序数组中的重复项 II](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array-ii/) | [RemoveDuplicates](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_80_removeDuplicates.java) | [数组](<https://leetcode-cn.com/tag/array/>)、[双指针](<https://leetcode-cn.com/tag/two-pointers/>) | Medium | | |
131 | 130 | | #86 | [分隔链表](https://leetcode-cn.com/problems/partition-list/) | [Partition](https://github.com/pphdsny/Leetcode-Java/blob/master/src/pp/arithmetic/leetcode/_86_Partition.java) | [链表](https://leetcode-cn.com/tag/linked-list/)、[双指针](<https://leetcode-cn.com/tag/two-pointers/>) | Medium | | |
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