80. 删除有序数组中的重复项 II https://leetcode.cn/problems/remove-duplicates-from-sorted-array-ii
125. 验证回文串 https://leetcode.cn/problems/valid-palindrome
75. 颜色分类 https://leetcode.cn/problems/sort-colors
88. 合并两个有序数组 https://leetcode.cn/problems/merge-sorted-array
977. 有序数组的平方 https://leetcode.cn/problems/squares-of-a-sorted-array
1329. 将矩阵按对角线排序 https://leetcode.cn/problems/sort-the-matrix-diagonally
1260. 二维网格迁移 https://leetcode.cn/problems/shift-2d-grid
867. 转置矩阵 https://leetcode.cn/problems/transpose-matrix
14. 最长公共前缀 https://leetcode.cn/problems/longest-common-prefix
不要小看数组双指针技巧，它可以变出很多花样来。下面就来看看几个有趣的例题。