单词拆分 I · Word Break】的更多相关文章

单词拆分2,递归+dp, 需要使用递归,同时使用记忆化搜索保存下来结果,c++代码如下 class Solution { public: //定义一个子串和子串拆分(如果有的话)的映射 unordered_map<string,vector<string>>m; vector<string> wordBreak(string s, vector<string>& wordDict) { if(m.count(s)) return m[s];//当映射…
[抄题]: 给出一个字符串s和一个词典,判断字符串s是否可以被空格切分成一个或多个出现在字典中的单词. s = "lintcode" dict = ["lint","code"] 返回 true 因为"lintcode"可以被空格切分成"lint code" [思维问题]: 看到字符串就怕:还是要掌握一般规律 [一句话思路]: 还是看rU手册456页的解法吧 前部完美切分+后部是单词 [输入量]:空: 正常…
一开始的错误答案与错误思路,幻想直接遍历得出答案: class Solution { public: bool wordBreak(string s, vector<string>& wordDict) { for(int i;i<s.size();i++){ ; for(int j;j<wordDict.size();j++){ if(s.substr(i,wordDict[j].size())==wordDict[j]){ step=wordDict[j].size()…
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible sentences. Note: The same word in the dictionary m…
139. 单词拆分 139. Word Break…
这道题相似  Word Break 推断能否把字符串拆分为字典里的单词 @LeetCode 只不过要求计算的并不不过能否拆分,而是要求出全部的拆分方案. 因此用递归. 可是直接递归做会超时,原因是LeetCode里有几个非常长可是无法拆分的情况.所以就先跑一遍Word Break,先推断能否拆分.然后再进行拆分. 递归思路就是,逐一尝试字典里的每个单词,看看哪一个单词和S的开头部分匹配,假设匹配则递归处理S的除了开头部分,直到S为空.说明能够匹配. Given a string s and a…
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or more dictionary words. Note: The same word in the dictionary may be reused multiple t…
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible sentences. Note: The same word in the dictionary m…
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…
[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…