要求最短距离.采纳dijkstra查找节点之间的最短路径. 当心:假设是一个枚举字典22是否元素可以,如果转换,暂停. 提高:每串,带您历数它的字符值事件,对于的长度n一个字符串枚举n*26次要. 设仅仅是简单的枚举,则会出现重边: 如abc,bbc,cbc,建图后每两个节点间均有两条双向边,这对于邻接表存储的图会存在非常多冗余边. 解决方法:每一个节点每位字符仅仅能从原始字符往后枚举,即 枚举各字符串第一位的话 abc:bbc,cbc,dbc,... bbc:cbc,dbc,... cbc:d…

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…

[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…

Leetcode(8)字符串转换整数 [题目表述]: 请你来实现一个 atoi 函数,使其能将字符串转换成整数. 首先,该函数会根据需要丢弃无用的开头空格字符,直到寻找到第一个非空格的字符为止. 当我们寻找到的第一个非空字符为正或者负号时,则将该符号与之后面尽可能多的连续数字组合起来,作为该整数的正负号:假如第一个非空字符是数字,则直接将其与之后连续的数字字符组合起来,形成整数. 该字符串除了有效的整数部分之后也可能会存在多余的字符,这些字符可以被忽略,它们对于函数不应该造成影响. 注意:假如该…

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…

[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 =…

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…

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…

Word Ladder II Total Accepted: 11755 Total Submissions: 102776My Submissions 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 i…

Word Ladder II 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 timeEach intermediate word must exist in the dictionaryFor example, Given…