做了一个小小的优化,拿掉了Find Flag: View Code SOLUTION 2: http://www.ninechapter.com/solutions/ GITHUB: https://github.com/yuzhangcmu/LeetCode_algorithm/blob/master/string/FindLadders.java https://github.com/yuzhangcmu/LeetCode_algorithm/blob/master/string/FindLadders_1218_2014.java...
https://github.com/yuzhangcmu/LeetCode_algorithm/blob/master/bfs/LadderLength_1218_2014.java
Can you solve this real interview question? Word Ladder - A transformation sequence from word beginWord to word endWord using a dictionary wordList is a sequence of words beginWord -> s1 -> s2 -> ... -> sk such that: * Every adjacent pair of words diff
思路和word Ladder是同样的,仅仅只是本题须要把左右的序列输出。 为了恢复转换序列在搜索的过程中,我们须要记录每一个可达单词的前继单词(所谓单词可达,就是start通过若干次字符变换后能够转换成当前单词)。 一旦我们找到end, 我们就能够通过前继恢复路径。这跟用dijkstra找最短路径的方法事实上非常相似。 【代码】 c...
【Leetcode】Word Ladder https://leetcode.com/problems/word-ladder/ 题目: beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWordto endWord, such that: Only one letter can be changed at a time...
127. Word Ladder https://leetcode.com/problems/word-ladder/description/ Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from be...127. Word Ladder ...127. Word Ladder Given two words (beginWord and endWord), ...
[算法分析与设计] leetcode 每周一题: Surrounded Regions 题目链接:https://leetcode.com/problems/surrounded-regions/description/ 题目大意:找出矩阵中被X围住的O,将之翻转成X, 注意位于边界的O即使有3个方向被围住,也不算。(不要求对角线围住) 题目思路: 1. 遍历矩阵的最外围,遇到O,则将之反转成#,...
returnlist;}privatevoiddfs(String cur,String end,Set<String>dict,HashMap<String,List<String>>nodeNeighbors,HashMap<String,Integer>distance,List<String>solution,List<List<String>>res){solution.add(cur);if(end.equals(cur)){res.add(newArrayList<>(solution));}else{List<String>neighbours=nodeNeighbor...
Word Ladder - LeetCode 注意点 每一个变化的字母都要在wordList中 解法 解法一:bfs。类似走迷宫,有26个方向(即26个字母),起点是beginWord,终点是endWord。每一次清空完队列ret+1表示走了一步。bfs可以保证是最短路径。 class Solution { public: int ladderLength(string beginWord, string endWord, vector<st...
Solution { 2 public: 3 typedef unordered_map<string, unsigned> MyHashMap; 4 typedef unordered_map<string, vector<string>> SVMap; 5 vector<vector<string>> findLadders(string start, string end, unordered_set<string> &dict) {