单词拼接时间限制:3000 ms | 内存限制:65535 KB难度:5 描述给你一些单词,请你判断能否把它们首尾串起来串成一串.前一个单词的结尾应该与下一个单词的道字母相同.如 aloha dog arachnid gopher tiger rat 可以拼接成:aloha.arachnid.dog.gopher.rat.tiger 输入第一行是一个整数N(0<N<20),表示测试数据的组数每组测试数据的第一行是一个整数M,表示该组测试数据中有M(2<M<1000)个互不相同的单词…
[139-Word Break(单词拆分)] [LeetCode-面试算法经典-Java实现][全部题目文件夹索引] 原题 Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words. For example, given s = "leetcode", di…
如何将一串单词组成的字符串倒序呢?如:" we go to school" 变成"school to go we "java代码实现: public static String rever(String str) { //这样写有一个问题就是 如果字符串最后面有空格split()方法是不能把最后的空格分出来的. 字符串前面有空格没关系 StringBuilder sb = new StringBuilder();//用于接收莫表字符串 String[] string…
Given a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible sentences. For example, given s = "catsanddog", dict = ["cat", "cats&quo…
You are given a string, S, and a list of words, L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenation of each word in L exactly once and without any intervening characters. For example, given:S: "b…