题目: Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the wor…

给出两个单词(beginWord 和 endWord)和一个字典,找到从 beginWord 到 endWord 的最短转换序列,转换需遵循如下规则:    每次只能改变一个字母.    变换过程中的中间单词必须在字典中出现.例如,给出:beginWord = "hit"endWord = "cog"wordList = ["hot","dot","dog","lot","lo…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the word li…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the word li…

127. Word Ladder 这道题使用bfs来解决,每次将满足要求的变换单词加入队列中. wordSet用来记录当前词典中的单词,做一个单词变换生成一个新单词,都需要判断这个单词是否在词典中,不在词典中就不能加入队列. pathCnt用来记录遍历到的某一个词使用的次数,做一个单词变换生成一个新单词,都需要判断这个单词是否在pathCnt中,如果在,则说明之前已经达到过,这次不用再计算了,因为这次计算的path肯定比之前多.pathCnt相当于剪枝. class Solution { pub…

127. Word LadderGiven two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exis…

Word Ladder Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary For example,…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time Each intermediate word must exist in the word li…

原题地址 BFS Word Ladder II的简化版(参见这篇文章) 由于只需要计算步数,所以简单许多. 代码: int ladderLength(string start, string end, unordered_set<string> &dict) { if (start == end) ; unordered_set<string> old; queue<string> layer; ; layer.push(start); while (!laye…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the word li…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/word-ladder/description/ 题目描述: Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time Each intermediate word must exist in the word li…

https://leetcode.com/problems/word-ladder/ Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time Each…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the word li…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time Each intermediate word must exist in the word li…

Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary For example, Given:start…

Given two words (beginWord and endWord), and a dictionary, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary For exam…

Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time. Each transformed word must exist in the word li…

题目: 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.…

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…

Given two words (start and end), and a dictionary, find all shortest transformation sequence(s) from start to end, such that: Only one letter can be changed at a time    Each intermediate word must exist in the dictionary For example, Given:start = "…

Leetcode之广度优先搜索(BFS)专题-127. 单词接龙(Word Ladder) BFS入门详解:Leetcode之广度优先搜索(BFS)专题-429. N叉树的层序遍历(N-ary Tree Level Order Traversal) 相同思路的题目:Leetcode之广度优先搜索(BFS)专题-752. 打开转盘锁(Open the Lock) 给定两个单词(beginWord 和 endWord)和一个字典,找到从 beginWord 到 endWord 的最短转换序列的长度.…

[题目] Given two words (start and end), and a dictionary, find all shortest transformation sequence(s) from start to end, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary For example, Given:start =…

题意:给出两个单词,以及一个set集合,当中是很多的单词.unordered_set是无序的集合,也就是说找的序列也是无序的了,是C++11的标准,可能得升级你的编译器版本了.要求找出一个从start到end这两个单词的变换序列.从start开始,每次可以变一个字母,且所变之后的单词必须在set中,最后要求变成end,问经过了多少个中间变换?注意要加多2次(start和end也要算),这是规定. 思路:广度搜索,以start为树根,一层一层扩展,直到找到end,返回数的深度即可.步骤是这样的,先…

127. 单词接龙 给定两个单词(beginWord 和 endWord)和一个字典,找到从 beginWord 到 endWord 的最短转换序列的长度.转换需遵循如下规则: 每次转换只能改变一个字母. 转换过程中的中间单词必须是字典中的单词. 说明: 如果不存在这样的转换序列,返回 0. 所有单词具有相同的长度. 所有单词只由小写字母组成. 字典中不存在重复的单词. 你可以假设 beginWord 和 endWord 是非空的,且二者不相同. 示例 1: 输入: beginWord = "h…

Given two words (beginWord and endWord), and a dictionary, find the length of shortest transformation sequence from beginWord to endWord, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary For exam…

Given two words (start and end), and a dictionary, find all shortest transformation sequence(s) from start to end, such that: Only one letter can be changed at a time Each intermediate word must exist in the dictionary For example, Given: start = "hi…

其他LeetCode题目欢迎访问:LeetCode结题报告索引 LeetCode:Word Ladder Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end, such that: Only one letter can be changed at a time Each intermediate word…

题目链接 算法:DFS+考你阅题 题目描述: 单词接龙是一个与我们经常玩的成语接龙相类似的游戏,现在我们已知一组单词,且给定一个开头的字母,要求出以这个字母开头的最长的“龙”(每个单词都最多在“龙”中出现两次),在两个单词相连时,其重合部分合为一部分,例如beast和astonish,如果接成一条龙则变为beastonish,另外相邻的两部分不能存在包含关系,例如at和atide间不能相连. 此题深坑,误人子弟,如果就普通的搜索只得66分 注意(看了题解后发现的= =): 所谓“两部分不能存在包…

[leetcode]Word Ladder II @ Python 原题地址:http://oj.leetcode.com/problems/word-ladder-ii/ 参考文献:http://blog.csdn.net/doc_sgl/article/details/13341405   http://chaoren.is-programmer.com/ 题意:给定start单词,end单词,以及一个dict字典.要求找出start到end的所有最短路径,路径上的每个单词都要出现在dict…