leetcode336.迴文對

1.題目描述 給定一組惟一的單詞， 找出全部不一樣 的索引對(i, j)，使得列表中的兩個單詞， words[i] + words[j] ，可拼接成迴文串。python 示例 1:數組 輸入: ["abcd","dcba","lls","s","sssll"] 輸出: [[0,1],[1,0],[3,2],[2,4]]  解釋: 可拼接成的迴文串爲 ["dcbaabcd","abcddcba","

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