LeetCode高频题目，包含学习整理的文章和刷题模板，参考宫水三叶博主、《算法（第四版）》、《算法导论》和《Hello 算法》

**刷前必读**：[学算法要读《算法导论》吗？](https://blog.csdn.net/qq_46225886/article/details/136286109) ## 双指针 - 相关学习：[关于双指针算法问题的思考](https://juejin.cn/post/7292631628652183602) ### 数组 | 题目链接 | 题解 | 备注 | |-----------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------|----| | [26. 删除有序数组中的重复项 简单](https://leetcode.cn/problems/remove-duplicates-from-sorted-array/) | [Solution26.java](src%2Fleetcode%2Fdoublepointer%2FSolution26.java) | ✅ | | [392. 判断子序列 简单](https://leetcode.cn/problems/is-subsequence/) | [Solution392.java](src%2Fleetcode%2Fdoublepointer%2FSolution392.java) | ✅ | | [27. 移除元素 简单](https://leetcode.cn/problems/remove-element/) | [Solution27.java](src%2Fleetcode%2Fdoublepointer%2FSolution27.java) | ✅ | | [LCR 139. 训练计划 I 简单](https://leetcode.cn/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof/) | [SolutionLCR139.java](src%2Fleetcode%2Fdoublepointer%2FSolutionLCR139.java) | ✅ | | [面试题 10.01. 合并排序的数组 简单](https://leetcode.cn/problems/sorted-merge-lcci/) | [Interview1001.java](src%2Fleetcode%2Fdoublepointer%2FInterview1001.java) | ✅ | | [88. 合并两个有序数组 简单](https://leetcode.cn/problems/merge-sorted-array/) | [Solution88.java](src%2Fleetcode%2Fdoublepointer%2FSolution88.java) | ✅ | | [581. 最短无序连续子数组 中等](https://leetcode.cn/problems/shortest-unsorted-continuous-subarray/) | [Solution581.java](src%2Fleetcode%2Fdoublepointer%2FSolution581.java) | ✅ | | [80. 删除有序数组中的重复项 II 中等](https://leetcode.cn/problems/remove-duplicates-from-sorted-array-ii/) | [Solution80.java](src%2Fleetcode%2Fdoublepointer%2FSolution80.java) | ✅ | | [11. 盛最多水的容器 中等](https://leetcode.cn/problems/container-with-most-water/) | [Solution11.java](src%2Fleetcode%2Fdoublepointer%2FSolution11.java) | ✅ | | [881. 救生艇 中等](https://leetcode.cn/problems/boats-to-save-people/) | [Solution881.java](src%2Fleetcode%2Fdoublepointer%2FSolution881.java) | ✅ | | [870. 优势洗牌 中等](https://leetcode.cn/problems/advantage-shuffle/) | [Solution870.java](src%2Fleetcode%2Fdoublepointer%2FSolution870.java) | ✅ | | [658. 找到 K 个最接近的元素 中等](https://leetcode.cn/problems/find-k-closest-elements/) | [Solution658.java](src%2Fleetcode%2Fdoublepointer%2FSolution658.java) | | | [825. 适龄的朋友 中等](https://leetcode.cn/problems/friends-of-appropriate-ages/) | [Solution825.java](src%2Fleetcode%2Fdoublepointer%2FSolution825.java) | | | [56. 合并区间 中等](https://leetcode.cn/problems/merge-intervals/) | [Solution56.java](src%2Fleetcode%2Fdoublepointer%2FSolution56.java) | ✅ | | [413. 等差数列划分 中等](https://leetcode.cn/problems/arithmetic-slices/) | [Solution413.java](src%2Fleetcode%2Fslidingwindow%2FSolution413.java) | | | [167. 两数之和 II - 输入有序数组 中等](https://leetcode.cn/problems/two-sum-ii-input-array-is-sorted/) | [Solution167.java](src%2Fleetcode%2Fdoublepointer%2FSolution167.java) | | | [15. 三数之和 中等](https://leetcode.cn/problems/3sum/) | [Solution15.java](src%2Fleetcode%2Fdoublepointer%2FSolution15.java) | | | [16. 最接近的三数之和 中等](https://leetcode.cn/problems/3sum-closest/) | [Solution16.java](src%2Fleetcode%2Fdoublepointer%2FSolution16.java) | | | [18. 四数之和 中等](https://leetcode.cn/problems/4sum/) | [Solution18.java](src%2Fleetcode%2Fdoublepointer%2FSolution18.java) | | | [134. 加油站 中等](https://leetcode.cn/problems/gas-station/) | [Solution134.java](src%2Fleetcode%2Fdoublepointer%2FSolution134.java) | | ### 字符串 | 题目链接 | 题解 | 备注 | |-------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------|-------------------------------------------| | [125. 验证回文串 简单](https://leetcode.cn/problems/valid-palindrome/) | [Solution125.java](src%2Fleetcode%2Fdoublepointer%2FSolution125.java) | ✅Character.isLetterOrDigit() 静态方法判断是字母和数字 | | [面试题 17.11. 单词距离 中等](https://leetcode.cn/problems/find-closest-lcci/) | [Interview1711.java](src%2Fleetcode%2Fdoublepointer%2FInterview1711.java) | ✅ | | [809. 情感丰富的文字 中等](https://leetcode.cn/problems/expressive-words/) | [Solution809.java](src%2Fleetcode%2Fdoublepointer%2FSolution809.java) | ✅ | | [443. 压缩字符串 中等](https://leetcode.cn/problems/string-compression/) | [Solution443.java](src%2Fleetcode%2Fdoublepointer%2FSolution443.java) | ✅ | | [481. 神奇字符串 中等](https://leetcode.cn/problems/magical-string/) | [Solution481.java](src%2Fleetcode%2Fdoublepointer%2FSolution481.java) | ✅ | | [524. 通过删除字母匹配到字典里最长单词 中等](https://leetcode.cn/problems/longest-word-in-dictionary-through-deleting/) | [Solution524.java](src%2Fleetcode%2Fdoublepointer%2FSolution524.java) | ✅ | | [777. 在LR字符串中交换相邻字符 中等](https://leetcode.cn/problems/swap-adjacent-in-lr-string/) | [Solution777.java](src%2Fleetcode%2Fdoublepointer%2FSolution777.java) | | | [838. 推多米诺 中等](https://leetcode.cn/problems/push-dominoes/) | [Solution838.java](src%2Fleetcode%2Fdoublepointer%2FSolution838.java) | ✅ | | [面试题 01.05. 一次编辑 中等](https://leetcode.cn/problems/one-away-lcci/) | [Interview0105.java](src%2Fleetcode%2Fdoublepointer%2FInterview0105.java) | | ## 滑动窗口 - 相关学习：[滑动窗口算法技巧](https://juejin.cn/post/7287907234704162828) ### 固定窗口 | 题目链�