leetcode24:word-ladder-ii 题目描述 给定两个单词(初始单词和目标单词)和一个单词字典,请找出所有的从初始单词到目标单词的最短转换序列: 每一次转换只能改变一个单词 每一个中间词都必须存在单词字典当中 例如: 给定的初始单词start="hit", 目标单词end ="cog"。 单词字典dict =["hot","dot","dog","lot...
找到father 路径后,从end开始往前dfs就可以得到所有的结果了 1classSolution {2public:3vector<vector<string>> findLadders(stringstart,stringend, unordered_set<string> &dict) {45vector<vector<string>>result;6unordered_set<string> unvisited=dict;78dict.insert(start);9dict.insert(end);1011unordered_map...
比如第一个例子里面<hit, {hot}>就是一个表示hit经过第一次变化得来的一个集合。这样把所有的dict的word按照如此的计算过程来存入hash表中,就生成了一个类似图的hash表,表示了走到某一个点需要几步。生成完之后,我们就能够用dfs来求解,这样就避免了很多的重复计算。 要生成这样的一个hash表,我们需要先做一遍bf...
双向搜索解决WordLadderII问题 一到源自于 LeetCode 上的题,链接 Word Ladder II - LeetCodeleetcode.com/problems/word-ladder-ii/description/ 根据题意,要找到 beginWord 到 endWord 的所有变换路径,双向搜索的思路是:依次填充以 beginWord 和 endWord 为终点的两个有向图,当两个有向图出现共同单词时,以共...
LeetCode: Word Ladder II [127] 【题目】 Given two words (startandend), and a dictionary, find all shortest transformation sequence(s) fromstarttoend, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary...
【Leetcode】Word Ladder II https://leetcode.com/problems/word-ladder-ii/ 题目: beginWord and endWord), and a dictionary's word list, find all shortest transformation sequence(s) from beginWord toendWord, such that: Only one letter can be changed at a time...
【LeetCode训练营】(数据流,哈希表)685. First Unique Number in Data Stream 3.9万 146 19:02 App 算法与数据结构,回溯法求解八皇后,最经典的递归问题 1698 4 27:07 App 花花酱 LeetCode 126. Word Ladder II - 刷题找工作 EP72 27.3万 904 14:19 App 程序媛分享 | LeetCode小白如何上手刷题?iPad...
Given two words (beginWord and endWord), and a dictionary's word list, find all shortest transformation sequence(s) from beginWord to endWord, such that: Only one letter can be changed at a time Each transformed word must exist in the word list. Note that beginWord is not a transformed wo...
LeetCode 0127. Word Ladder单词接龙【Medium】【Python】【BFS】 Problem LeetCode Given two words (beginWordandendWord), and a dictionary's word list, find the length of shortest transformation sequence frombeginWordtoendWord, such that: Only one letter can be changed at a time. ...
花花酱 LeetCode 2081. Sum of k-Mirror Numbers 3 Comments 127. Word Ladder – GCDLA March 30, 2019 […] Reference: http://zxi.mytechroad.com/blog/searching/127-word-ladder/ […] Log in to Reply 752. Open the Lock – GCDLA April 2, 2019 […] Reference: http://zxi.mytech...