LeetCode-472-连接词
题目
给你一个 不含重复 单词的字符串数组 words ，请你找出并返回 words 中的所有 连接词 。
连接词 定义为：一个完全由给定数组中的至少两个较短单词组成的字符串。
示例
输入：words = ["cat","cats","catsdogcats","dog","dogcatsdog","hippopotamuses","rat","ratcatdogcat"]
输出：["catsdogcats","dogcatsdog","ratcatdogcat"]
解释："catsdogcats" 由 "cats", "dog" 和 "cats" 组成;
"dogcatsdog" 由 "dog", "cats" 和 "dog" 组成;
"ratcatdogcat" 由 "rat", "cat", "dog" 和 "cat" 组成。
输入：words = ["cat","dog","catdog"]
输出：["catdog"]