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‎README.md‎

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44

55
### Hash related
66

7-
- [q1_sum of two numbers](/src/hash相关/q1_两数之和)
8-
- [q387_the first unique character in the string](/src/hash相关/q387_字符串中的第一个唯一字符)
7+
- [Question 1 : sum of two numbers](/src/hash相关/q1_两数之和)
8+
- [Question 387 : the first unique character in the string](/src/hash相关/q387_字符串中的第一个唯一字符)
99

1010
### Linked list operation
1111

12-
- [q2_Add two numbers](/src/链表操作/q2_两数相加)
13-
- [q19_delete the Nth node from the bottom of the linked list](/src/链表操作/q19_删除链表的倒数第N个节点)
14-
- [q25_k set of flipped linked lists](/src/链表操作/q25_k个一组翻转链表)
15-
- [q61_rotating linked list](/src/链表操作/q61_旋转链表)
16-
- [q138_copy linked list with random pointer](/src/链表操作/q138_复制带随机指针的链表)
17-
- [q206_reverse linked list](/src/链表操作/q206_反转链表)
12+
- [Question 2 : Add two numbers](/src/链表操作/q2_两数相加)
13+
- [Question 19 : delete the Nth node from the bottom of the linked list](/src/链表操作/q19_删除链表的倒数第N个节点)
14+
- [Question 25 : k set of flipped linked lists](/src/链表操作/q25_k个一组翻转链表)
15+
- [Question 61 : rotating linked list](/src/链表操作/q61_旋转链表)
16+
- [Question 138 : copy linked list with random pointer](/src/链表操作/q138_复制带随机指针的链表)
17+
- [Question 206 : reverse linked list](/src/链表操作/q206_反转链表)
1818

1919
### Double pointer traversal/sliding window
2020

21-
- [q3_Longest substring without repeated characters](/src/双指针遍历/q3_无重复字符的最长子串)
22-
- [q11_Container with the most water](/src/双指针遍历/q11_盛最多水的容器)
23-
- [q15_sum of three numbers](/src/双指针遍历/q15_三数之和)
24-
- [q16_closest sum of three numbers](/src/双指针遍历/q16_最接近的三数之和)
25-
- [q26_delete duplicates in the sorted array](/src/双指针遍历/q26_删除排序数组中的重复项)
26-
- [q42_trapping-rain-water](/src/双指针遍历/q42_接雨水)
27-
- [q121_The best time to buy and sell stocks](/src/双指针遍历/q121_买卖股票的最佳时机)
28-
- [q209_The smallest length sub-array](/src/双指针遍历/q209_长度最小的子数组)
21+
- [Question 3 : Longest substring without repeated characters](/src/双指针遍历/q3_无重复字符的最长子串)
22+
- [Question 11 : Container with the most water](/src/双指针遍历/q11_盛最多水的容器)
23+
- [Question 15 : sum of three numbers](/src/双指针遍历/q15_三数之和)
24+
- [Question 16 : closest sum of three numbers](/src/双指针遍历/q16_最接近的三数之和)
25+
- [Question 26 : delete duplicates in the sorted array](/src/双指针遍历/q26_删除排序数组中的重复项)
26+
- [Question 42 : trapping-rain-water](/src/双指针遍历/q42_接雨水)
27+
- [Question 121 : The best time to buy and sell stocks](/src/双指针遍历/q121_买卖股票的最佳时机)
28+
- [Question 209 : The smallest length sub-array](/src/双指针遍历/q209_长度最小的子数组)
2929

3030
### Fast and slow pointer traversal
3131

32-
- [q141_circular linked list](/src/快慢指针遍历/q141_环形链表)
33-
- [q202_happy number](/src/快慢指针遍历/q202_快乐数)
34-
- [q876_intermediate node of linked list](/src/快慢指针遍历/q876_链表的中间结点)
32+
- [Question 141 : circular linked list](/src/快慢指针遍历/q141_环形链表)
33+
- [Question 202 : happy number](/src/快慢指针遍历/q202_快乐数)
34+
- [Question 876 : intermediate node of linked list](/src/快慢指针遍历/q876_链表的中间结点)
3535

3636
### Interval merge
3737

38-
- [q56_Merge interval](/src/区间合并/q56_合并区间)
38+
- [Question 56 : Merge interval](/src/区间合并/q56_合并区间)
3939

4040
### String manipulation
4141

42-
- [q6_Zigzag transformation](/src/字符串操作/q6_Z字形变换)
43-
- [q14_longest common prefix](/src/字符串操作/q14_最长公共前缀)
44-
- [q763_Dividing letter interval](/src/字符串操作/q763_划分字母区间)
42+
- [Question 6 : Zigzag transformation](/src/字符串操作/q6_Z字形变换)
43+
- [Question 14 : longest common prefix](/src/字符串操作/q14_最长公共前缀)
44+
- [Question 763 : Dividing letter interval](/src/字符串操作/q763_划分字母区间)
4545

4646
### Digital operation
4747

48-
- [q7_integer inversion](/src/数字操作/q7_整数反转)
49-
- [q8_string conversion integer](/src/数字操作/q8_字符串转换整数)
50-
- [q9_Palindrome Number](/src/数字操作/q9_回文数)
51-
- [q43_string multiplication](/src/数字操作/q43_字符串相乘)
52-
- [q172_zero after factorial](/src/数字操作/q172_阶乘后的零)
53-
- [q258_Add everybody](/src/数字操作/q258_各位相加)
48+
- [Question 7 : integer inversion](/src/数字操作/q7_整数反转)
49+
- [Question 8 : string conversion integer](/src/数字操作/q8_字符串转换整数)
50+
- [Question 9 : Palindrome Number](/src/数字操作/q9_回文数)
51+
- [Question 43 : string multiplication](/src/数字操作/q43_字符串相乘)
52+
- [Question 172 : zero after factorial](/src/数字操作/q172_阶乘后的零)
53+
- [Question 258 : Add everybody](/src/数字操作/q258_各位相加)
5454

5555
### Array operations
5656

57-
- [q54_spiral matrix](/src/数组操作/q54_螺旋矩阵)
58-
- [q73_Zero Matrix](/src/数组操作/q73_矩阵置零)
59-
- [q78_subset](/src/数组操作/q78_子集)
60-
- [q384_scrambling array](/src/数组操作/q384_打乱数组)
61-
- [q581_shortest unordered continuous subarray](/src/数组操作/q581_最短无序连续子数组)
62-
- [q945_Minimum increment to make the array unique](/src/数组操作/q945_使数组唯一的最小增量)
57+
- [Question 54 : spiral matrix](/src/数组操作/q54_螺旋矩阵)
58+
- [Question 73 : Zero Matrix](/src/数组操作/q73_矩阵置零)
59+
- [Question 78 : subset](/src/数组操作/q78_子集)
60+
- [Question 384 : scrambling array](/src/数组操作/q384_打乱数组)
61+
- [Question 581 : shortest unordered continuous subarray](/src/数组操作/q581_最短无序连续子数组)
62+
- [Question 945 : Minimum increment to make the array unique](/src/数组操作/q945_使数组唯一的最小增量)
6363

6464
### Stack related
6565

66-
- [q20_valid brackets](/src/栈相关/q20_有效的括号)
67-
- [q32_longest valid bracket](/src/栈相关/q32_最长有效括号)
68-
- [q155_Minimal stack](/src/栈相关/q155_最小栈)
69-
- [q224_basic calculator](/src/栈相关/q224_基本计算器)
70-
- [q232_implement queue with stack](/src/栈相关/q232_用栈实现队列)
71-
- [q316_remove duplicate letters](/src/栈相关/q316_去除重复字母)
66+
- [Question 20 : valid brackets](/src/栈相关/q20_有效的括号)
67+
- [Question 32 : longest valid bracket](/src/栈相关/q32_最长有效括号)
68+
- [Question 155 : Minimal stack](/src/栈相关/q155_最小栈)
69+
- [Question 224 : basic calculator](/src/栈相关/q224_基本计算器)
70+
- [Question 232 : implement queue with stack](/src/栈相关/q232_用栈实现队列)
71+
- [Question 316 : remove duplicate letters](/src/栈相关/q316_去除重复字母)
7272

7373
### Heap related
7474

75-
- [q215_the Kth largest element in the array](/src/堆相关/q215_数组中的第K个最大元素)
76-
- [q347_top K high frequency elements](/src/堆相关/q347_前K个高频元素)
75+
- [Question 215 : the Kth largest element in the array](/src/堆相关/q215_数组中的第K个最大元素)
76+
- [Question 347 : top K high frequency elements](/src/堆相关/q347_前K个高频元素)
7777

7878
### Recursion
7979

80-
- [q21_merge two ordered linked lists](/src/递归/q21_合并两个有序链表)
81-
- [q101_symmetric binary tree](/src/递归/q101_对称二叉树)
82-
- [q104_Maximum Depth of Binary Tree](/src/递归/q104_二叉树的最大深度)
83-
- [q226_flip binary tree](/src/递归/q226_翻转二叉树)
84-
- [q236_The nearest common ancestor of the binary tree](/src/递归/q236_二叉树的最近公共祖先)
80+
- [Question 21 : merge two ordered linked lists](/src/递归/q21_合并两个有序链表)
81+
- [Question 101 : symmetric binary tree](/src/递归/q101_对称二叉树)
82+
- [Question 104 : Maximum Depth of Binary Tree](/src/递归/q104_二叉树的最大深度)
83+
- [Question 226 : flip binary tree](/src/递归/q226_翻转二叉树)
84+
- [Question 236 : The nearest common ancestor of the binary tree](/src/递归/q236_二叉树的最近公共祖先)
8585

8686
### Divide and Conquer/Dichotomy
8787

88-
- [q23_Merge K sorted lists](/src/分治法/q23_合并K个排序链表)
89-
- [q33_Search rotating sorted array](/src/分治法/q33_搜索旋转排序数组)
90-
- [q34_Find the first and last position of an element in the sorted array](/src/分治法/q34_在排序数组中查找元素的第一个和最后一个位置)
88+
- [Question 23 : Merge K sorted lists](/src/分治法/q23_合并K个排序链表)
89+
- [Question 33 : Search rotating sorted array](/src/分治法/q33_搜索旋转排序数组)
90+
- [Question 34 : Find the first and last position of an element in the sorted array](/src/分治法/q34_在排序数组中查找元素的第一个和最后一个位置)
9191

9292
### Dynamic Planning
9393

94-
- [q5_longest palindrome substring](/src/动态规划/q5_最长回文子串)
95-
- [q53_Maximum Subsequence Sum](/src/动态规划/q53_最大子序和)
96-
- [q62_different path](/src/动态规划/q62_不同路径)
97-
- [q64_Minimum path sum](/src/动态规划/q64_最小路径和)
98-
- [q70_stair climbing](/src/动态规划/q70_爬楼梯)
99-
- [q118\_杨辉 Triangle](/src/动态规划/q118_杨辉三角)
100-
- [q300_Longest Ascending Subsequence](/src/动态规划/q300_最长上升子序列)
101-
- [q1143_longest common subsequence](/src/动态规划/q1143_最长公共子序列)
102-
- [q1277_square submatrix with all 1s](/src/动态规划/q1277_统计全为1的正方形子矩阵)
94+
- [Question 5 : longest palindrome substring](/src/动态规划/q5_最长回文子串)
95+
- [Question 53 : Maximum Subsequence Sum](/src/动态规划/q53_最大子序和)
96+
- [Question 62 : different path](/src/动态规划/q62_不同路径)
97+
- [Question 64 : Minimum path sum](/src/动态规划/q64_最小路径和)
98+
- [Question 70 : stair climbing](/src/动态规划/q70_爬楼梯)
99+
- [Question 118 : Pascal's Triangle](/src/动态规划/q118_杨辉三角)
100+
- [Question 300 : Longest Ascending Subsequence](/src/动态规划/q300_最长上升子序列)
101+
- [Question 1143 : longest common subsequence](/src/动态规划/q1143_最长公共子序列)
102+
- [Question 1277 : square submatrix with all 1s](/src/动态规划/q1277_统计全为1的正方形子矩阵)
103103

104104
### Backtracking
105105

106-
- [q10_regular expression matching](/src/回溯法/q10_正则表达式匹配)
107-
- [q22_bracket generation](/src/回溯法/q22_括号生成)
108-
- [q40_combined sum 2](/src/回溯法/q40_组合总和2)
109-
- [q46_all permutation](/src/回溯法/q46_全排列)
106+
- [Question 10 : regular expression matching](/src/回溯法/q10_正则表达式匹配)
107+
- [Question 22 : bracket generation](/src/回溯法/q22_括号生成)
108+
- [Question 40 : combined sum 2](/src/回溯法/q40_组合总和2)
109+
- [Question 46 : all permutation](/src/回溯法/q46_全排列)
110110

111111
### Tree traversal
112112

113-
- [q94_In-order traversal of binary tree](/src/树的遍历/q94_二叉树的中序遍历)
114-
- [q102_Binary tree traversal](/src/树的遍历/q102_二叉树的层次遍历)
115-
- [q110_balanced binary tree](/src/树的遍历/q110_平衡二叉树)
116-
- [q144_Preorder traversal of binary tree](/src/树的遍历/q144_二叉树的前序遍历)
117-
- [q145_Post-order traversal of binary tree](/src/树的遍历/q145_二叉树的后序遍历)
113+
- [Question 94 : In-order traversal of binary tree](/src/树的遍历/q94_二叉树的中序遍历)
114+
- [Question 102 : Binary tree traversal](/src/树的遍历/q102_二叉树的层次遍历)
115+
- [Question 110 : balanced binary tree](/src/树的遍历/q110_平衡二叉树)
116+
- [Question 144 : Preorder traversal of binary tree](/src/树的遍历/q144_二叉树的前序遍历)
117+
- [Question 145 : Post-order traversal of binary tree](/src/树的遍历/q145_二叉树的后序遍历)
118118

119119
### Binary search tree related
120120

121-
- [q98_Verify Binary Search Tree](/src/二叉搜索树相关/q98_验证二叉搜索树)
122-
- [q450_delete nodes in binary search tree](/src/二叉搜索树相关/q450_删除二叉搜索树中的节点)
123-
- [q701_insert operation in binary search tree](/src/二叉搜索树相关/q701_二叉搜索树中的插入操作)
121+
- [Question 98 : Verify Binary Search Tree](/src/二叉搜索树相关/q98_验证二叉搜索树)
122+
- [Question 450 : delete nodes in binary search tree](/src/二叉搜索树相关/q450_删除二叉搜索树中的节点)
123+
- [Question 701 : insert operation in binary search tree](/src/二叉搜索树相关/q701_二叉搜索树中的插入操作)
124124

125125
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