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Title: GitHub - fridafeng/LeetCode: LeetCode刷题记录 · GitHub

Open Graph Title: GitHub - fridafeng/LeetCode: LeetCode刷题记录

X Title: GitHub - fridafeng/LeetCode: LeetCode刷题记录

Description: LeetCode刷题记录. Contribute to fridafeng/LeetCode development by creating an account on GitHub.

Open Graph Description: LeetCode刷题记录. Contribute to fridafeng/LeetCode development by creating an account on GitHub.

X Description: LeetCode刷题记录. Contribute to fridafeng/LeetCode development by creating an account on GitHub.

Opengraph URL: https://github.com/fridafeng/LeetCode

X: @github

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https://github.com/fridafeng/LeetCode#leetcode题目分类与面试问题整理
https://github.com/fridafeng/LeetCode#题目分类
https://github.com/fridafeng/LeetCode#hash相关
q1_两数之和https://github.com/fridafeng/LeetCode/blob/master/src/hash%E7%9B%B8%E5%85%B3/q1_%E4%B8%A4%E6%95%B0%E4%B9%8B%E5%92%8C
q387_字符串中的第一个唯一字符https://github.com/fridafeng/LeetCode/blob/master/src/hash%E7%9B%B8%E5%85%B3/q387_%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%B8%AD%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%94%AF%E4%B8%80%E5%AD%97%E7%AC%A6
https://github.com/fridafeng/LeetCode#链表操作
q2_两数相加https://github.com/fridafeng/LeetCode/blob/master/src/%E9%93%BE%E8%A1%A8%E6%93%8D%E4%BD%9C/q2_%E4%B8%A4%E6%95%B0%E7%9B%B8%E5%8A%A0
q19_删除链表的倒数第N个节点https://github.com/fridafeng/LeetCode/blob/master/src/%E9%93%BE%E8%A1%A8%E6%93%8D%E4%BD%9C/q19_%E5%88%A0%E9%99%A4%E9%93%BE%E8%A1%A8%E7%9A%84%E5%80%92%E6%95%B0%E7%AC%ACN%E4%B8%AA%E8%8A%82%E7%82%B9
q25_k个一组翻转链表https://github.com/fridafeng/LeetCode/blob/master/src/%E9%93%BE%E8%A1%A8%E6%93%8D%E4%BD%9C/q25_k%E4%B8%AA%E4%B8%80%E7%BB%84%E7%BF%BB%E8%BD%AC%E9%93%BE%E8%A1%A8
q61_旋转链表https://github.com/fridafeng/LeetCode/blob/master/src/%E9%93%BE%E8%A1%A8%E6%93%8D%E4%BD%9C/q61_%E6%97%8B%E8%BD%AC%E9%93%BE%E8%A1%A8
q138_复制带随机指针的链表https://github.com/fridafeng/LeetCode/blob/master/src/%E9%93%BE%E8%A1%A8%E6%93%8D%E4%BD%9C/q138_%E5%A4%8D%E5%88%B6%E5%B8%A6%E9%9A%8F%E6%9C%BA%E6%8C%87%E9%92%88%E7%9A%84%E9%93%BE%E8%A1%A8
q206_反转链表https://github.com/fridafeng/LeetCode/blob/master/src/%E9%93%BE%E8%A1%A8%E6%93%8D%E4%BD%9C/q206_%E5%8F%8D%E8%BD%AC%E9%93%BE%E8%A1%A8
https://github.com/fridafeng/LeetCode#双指针遍历滑动窗口
q3_无重复字符的最长子串https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q3_%E6%97%A0%E9%87%8D%E5%A4%8D%E5%AD%97%E7%AC%A6%E7%9A%84%E6%9C%80%E9%95%BF%E5%AD%90%E4%B8%B2
q11_盛最多水的容器https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q11_%E7%9B%9B%E6%9C%80%E5%A4%9A%E6%B0%B4%E7%9A%84%E5%AE%B9%E5%99%A8
q15_三数之和https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q15_%E4%B8%89%E6%95%B0%E4%B9%8B%E5%92%8C
q16_最接近的三数之和https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q16_%E6%9C%80%E6%8E%A5%E8%BF%91%E7%9A%84%E4%B8%89%E6%95%B0%E4%B9%8B%E5%92%8C
q26_删除排序数组中的重复项https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q26_%E5%88%A0%E9%99%A4%E6%8E%92%E5%BA%8F%E6%95%B0%E7%BB%84%E4%B8%AD%E7%9A%84%E9%87%8D%E5%A4%8D%E9%A1%B9
q42_接雨水https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q42_%E6%8E%A5%E9%9B%A8%E6%B0%B4
q121_买卖股票的最佳时机https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q121_%E4%B9%B0%E5%8D%96%E8%82%A1%E7%A5%A8%E7%9A%84%E6%9C%80%E4%BD%B3%E6%97%B6%E6%9C%BA
q209_长度最小的子数组https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8F%8C%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q209_%E9%95%BF%E5%BA%A6%E6%9C%80%E5%B0%8F%E7%9A%84%E5%AD%90%E6%95%B0%E7%BB%84
https://github.com/fridafeng/LeetCode#快慢指针遍历
q141_环形链表https://github.com/fridafeng/LeetCode/blob/master/src/%E5%BF%AB%E6%85%A2%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q141_%E7%8E%AF%E5%BD%A2%E9%93%BE%E8%A1%A8
q202_快乐数https://github.com/fridafeng/LeetCode/blob/master/src/%E5%BF%AB%E6%85%A2%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q202_%E5%BF%AB%E4%B9%90%E6%95%B0
q876_链表的中间结点https://github.com/fridafeng/LeetCode/blob/master/src/%E5%BF%AB%E6%85%A2%E6%8C%87%E9%92%88%E9%81%8D%E5%8E%86/q876_%E9%93%BE%E8%A1%A8%E7%9A%84%E4%B8%AD%E9%97%B4%E7%BB%93%E7%82%B9
https://github.com/fridafeng/LeetCode#区间合并
q56_合并区间https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8C%BA%E9%97%B4%E5%90%88%E5%B9%B6/q56_%E5%90%88%E5%B9%B6%E5%8C%BA%E9%97%B4
https://github.com/fridafeng/LeetCode#字符串操作
q6_Z字形变换https://github.com/fridafeng/LeetCode/blob/master/src/%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%93%8D%E4%BD%9C/q6_Z%E5%AD%97%E5%BD%A2%E5%8F%98%E6%8D%A2
q14_最长公共前缀https://github.com/fridafeng/LeetCode/blob/master/src/%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%93%8D%E4%BD%9C/q14_%E6%9C%80%E9%95%BF%E5%85%AC%E5%85%B1%E5%89%8D%E7%BC%80
q763_划分字母区间https://github.com/fridafeng/LeetCode/blob/master/src/%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%93%8D%E4%BD%9C/q763_%E5%88%92%E5%88%86%E5%AD%97%E6%AF%8D%E5%8C%BA%E9%97%B4
https://github.com/fridafeng/LeetCode#数字操作
q7_整数反转https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C/q7_%E6%95%B4%E6%95%B0%E5%8F%8D%E8%BD%AC
q8_字符串转换整数https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C/q8_%E5%AD%97%E7%AC%A6%E4%B8%B2%E8%BD%AC%E6%8D%A2%E6%95%B4%E6%95%B0
q9_回文数https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C/q9_%E5%9B%9E%E6%96%87%E6%95%B0
q43_字符串相乘https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C/q43_%E5%AD%97%E7%AC%A6%E4%B8%B2%E7%9B%B8%E4%B9%98
q172_阶乘后的零https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C/q172_%E9%98%B6%E4%B9%98%E5%90%8E%E7%9A%84%E9%9B%B6
q258_各位相加https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C/q258_%E5%90%84%E4%BD%8D%E7%9B%B8%E5%8A%A0
https://github.com/fridafeng/LeetCode#数组操作
q54_螺旋矩阵https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E7%BB%84%E6%93%8D%E4%BD%9C/q54_%E8%9E%BA%E6%97%8B%E7%9F%A9%E9%98%B5
q73_矩阵置零https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E7%BB%84%E6%93%8D%E4%BD%9C/q73_%E7%9F%A9%E9%98%B5%E7%BD%AE%E9%9B%B6
q78_子集https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E7%BB%84%E6%93%8D%E4%BD%9C/q78_%E5%AD%90%E9%9B%86
q384_打乱数组https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E7%BB%84%E6%93%8D%E4%BD%9C/q384_%E6%89%93%E4%B9%B1%E6%95%B0%E7%BB%84
q581_最短无序连续子数组https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E7%BB%84%E6%93%8D%E4%BD%9C/q581_%E6%9C%80%E7%9F%AD%E6%97%A0%E5%BA%8F%E8%BF%9E%E7%BB%AD%E5%AD%90%E6%95%B0%E7%BB%84
q945_使数组唯一的最小增量https://github.com/fridafeng/LeetCode/blob/master/src/%E6%95%B0%E7%BB%84%E6%93%8D%E4%BD%9C/q945_%E4%BD%BF%E6%95%B0%E7%BB%84%E5%94%AF%E4%B8%80%E7%9A%84%E6%9C%80%E5%B0%8F%E5%A2%9E%E9%87%8F
https://github.com/fridafeng/LeetCode#栈相关
q20_有效的括号https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%88%E7%9B%B8%E5%85%B3/q20_%E6%9C%89%E6%95%88%E7%9A%84%E6%8B%AC%E5%8F%B7
q32_最长有效括号https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%88%E7%9B%B8%E5%85%B3/q32_%E6%9C%80%E9%95%BF%E6%9C%89%E6%95%88%E6%8B%AC%E5%8F%B7
q155_最小栈https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%88%E7%9B%B8%E5%85%B3/q155_%E6%9C%80%E5%B0%8F%E6%A0%88
q224_基本计算器https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%88%E7%9B%B8%E5%85%B3/q224_%E5%9F%BA%E6%9C%AC%E8%AE%A1%E7%AE%97%E5%99%A8
q232_用栈实现队列https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%88%E7%9B%B8%E5%85%B3/q232_%E7%94%A8%E6%A0%88%E5%AE%9E%E7%8E%B0%E9%98%9F%E5%88%97
q316_去除重复字母https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%88%E7%9B%B8%E5%85%B3/q316_%E5%8E%BB%E9%99%A4%E9%87%8D%E5%A4%8D%E5%AD%97%E6%AF%8D
https://github.com/fridafeng/LeetCode#堆相关
q215_数组中的第K个最大元素https://github.com/fridafeng/LeetCode/blob/master/src/%E5%A0%86%E7%9B%B8%E5%85%B3/q215_%E6%95%B0%E7%BB%84%E4%B8%AD%E7%9A%84%E7%AC%ACK%E4%B8%AA%E6%9C%80%E5%A4%A7%E5%85%83%E7%B4%A0
q347_前K个高频元素https://github.com/fridafeng/LeetCode/blob/master/src/%E5%A0%86%E7%9B%B8%E5%85%B3/q347_%E5%89%8DK%E4%B8%AA%E9%AB%98%E9%A2%91%E5%85%83%E7%B4%A0
https://github.com/fridafeng/LeetCode#递归
q21_合并两个有序链表https://github.com/fridafeng/LeetCode/blob/master/src/%E9%80%92%E5%BD%92/q21_%E5%90%88%E5%B9%B6%E4%B8%A4%E4%B8%AA%E6%9C%89%E5%BA%8F%E9%93%BE%E8%A1%A8
q101_对称二叉树https://github.com/fridafeng/LeetCode/blob/master/src/%E9%80%92%E5%BD%92/q101_%E5%AF%B9%E7%A7%B0%E4%BA%8C%E5%8F%89%E6%A0%91
q104_二叉树的最大深度https://github.com/fridafeng/LeetCode/blob/master/src/%E9%80%92%E5%BD%92/q104_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E6%9C%80%E5%A4%A7%E6%B7%B1%E5%BA%A6
q226_翻转二叉树https://github.com/fridafeng/LeetCode/blob/master/src/%E9%80%92%E5%BD%92/q226_%E7%BF%BB%E8%BD%AC%E4%BA%8C%E5%8F%89%E6%A0%91
q236_二叉树的最近公共祖先https://github.com/fridafeng/LeetCode/blob/master/src/%E9%80%92%E5%BD%92/q236_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88
https://github.com/fridafeng/LeetCode#分治法二分法
q23_合并K个排序链表https://github.com/fridafeng/LeetCode/blob/master/src/%E5%88%86%E6%B2%BB%E6%B3%95/q23_%E5%90%88%E5%B9%B6K%E4%B8%AA%E6%8E%92%E5%BA%8F%E9%93%BE%E8%A1%A8
q33_搜索旋转排序数组https://github.com/fridafeng/LeetCode/blob/master/src/%E5%88%86%E6%B2%BB%E6%B3%95/q33_%E6%90%9C%E7%B4%A2%E6%97%8B%E8%BD%AC%E6%8E%92%E5%BA%8F%E6%95%B0%E7%BB%84
q34_在排序数组中查找元素的第一个和最后一个位置https://github.com/fridafeng/LeetCode/blob/master/src/%E5%88%86%E6%B2%BB%E6%B3%95/q34_%E5%9C%A8%E6%8E%92%E5%BA%8F%E6%95%B0%E7%BB%84%E4%B8%AD%E6%9F%A5%E6%89%BE%E5%85%83%E7%B4%A0%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%92%8C%E6%9C%80%E5%90%8E%E4%B8%80%E4%B8%AA%E4%BD%8D%E7%BD%AE
https://github.com/fridafeng/LeetCode#动态规划
q5_最长回文子串https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q5_%E6%9C%80%E9%95%BF%E5%9B%9E%E6%96%87%E5%AD%90%E4%B8%B2
q53_最大子序和https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q53_%E6%9C%80%E5%A4%A7%E5%AD%90%E5%BA%8F%E5%92%8C
q62_不同路径https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q62_%E4%B8%8D%E5%90%8C%E8%B7%AF%E5%BE%84
q64_最小路径和https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q64_%E6%9C%80%E5%B0%8F%E8%B7%AF%E5%BE%84%E5%92%8C
q70_爬楼梯https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q70_%E7%88%AC%E6%A5%BC%E6%A2%AF
q118_杨辉三角https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q118_%E6%9D%A8%E8%BE%89%E4%B8%89%E8%A7%92
q300_最长上升子序列https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q300_%E6%9C%80%E9%95%BF%E4%B8%8A%E5%8D%87%E5%AD%90%E5%BA%8F%E5%88%97
q1143_最长公共子序列https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q1143_%E6%9C%80%E9%95%BF%E5%85%AC%E5%85%B1%E5%AD%90%E5%BA%8F%E5%88%97
q1277_统计全为1的正方形子矩阵https://github.com/fridafeng/LeetCode/blob/master/src/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/q1277_%E7%BB%9F%E8%AE%A1%E5%85%A8%E4%B8%BA1%E7%9A%84%E6%AD%A3%E6%96%B9%E5%BD%A2%E5%AD%90%E7%9F%A9%E9%98%B5
https://github.com/fridafeng/LeetCode#回溯法
q10_正则表达式匹配https://github.com/fridafeng/LeetCode/blob/master/src/%E5%9B%9E%E6%BA%AF%E6%B3%95/q10_%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5%BC%8F%E5%8C%B9%E9%85%8D
q22_括号生成https://github.com/fridafeng/LeetCode/blob/master/src/%E5%9B%9E%E6%BA%AF%E6%B3%95/q22_%E6%8B%AC%E5%8F%B7%E7%94%9F%E6%88%90
q40_组合总和2https://github.com/fridafeng/LeetCode/blob/master/src/%E5%9B%9E%E6%BA%AF%E6%B3%95/q40_%E7%BB%84%E5%90%88%E6%80%BB%E5%92%8C2
q46_全排列https://github.com/fridafeng/LeetCode/blob/master/src/%E5%9B%9E%E6%BA%AF%E6%B3%95/q46_%E5%85%A8%E6%8E%92%E5%88%97
https://github.com/fridafeng/LeetCode#树的遍历
q94_二叉树的中序遍历https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%91%E7%9A%84%E9%81%8D%E5%8E%86/q94_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86
q102_二叉树的层次遍历https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%91%E7%9A%84%E9%81%8D%E5%8E%86/q102_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%B1%82%E6%AC%A1%E9%81%8D%E5%8E%86
q110_平衡二叉树https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%91%E7%9A%84%E9%81%8D%E5%8E%86/q110_%E5%B9%B3%E8%A1%A1%E4%BA%8C%E5%8F%89%E6%A0%91
q144_二叉树的前序遍历https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%91%E7%9A%84%E9%81%8D%E5%8E%86/q144_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%89%8D%E5%BA%8F%E9%81%8D%E5%8E%86
q145_二叉树的后序遍历https://github.com/fridafeng/LeetCode/blob/master/src/%E6%A0%91%E7%9A%84%E9%81%8D%E5%8E%86/q145_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86
https://github.com/fridafeng/LeetCode#二叉搜索树相关
q98_验证二叉搜索树https://github.com/fridafeng/LeetCode/blob/master/src/%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E7%9B%B8%E5%85%B3/q98_%E9%AA%8C%E8%AF%81%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91
q450_删除二叉搜索树中的节点https://github.com/fridafeng/LeetCode/blob/master/src/%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E7%9B%B8%E5%85%B3/q450_%E5%88%A0%E9%99%A4%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%AD%E7%9A%84%E8%8A%82%E7%82%B9
q701_二叉搜索树中的插入操作https://github.com/fridafeng/LeetCode/blob/master/src/%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E7%9B%B8%E5%85%B3/q701_%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%AD%E7%9A%84%E6%8F%92%E5%85%A5%E6%93%8D%E4%BD%9C
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