leetcode336.回文对

1.题目描述 给定一组惟一的单词， 找出全部不一样 的索引对(i, j)，使得列表中的两个单词， words[i] + words[j] ，可拼接成回文串。python 示例 1:数组 输入: ["abcd","dcba","lls","s","sssll"] 输出: [[0,1],[1,0],[3,2],[2,4]]  解释: 可拼接成的回文串为 ["dcbaabcd","abcddcba","

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