Can you solve this real interview question? Word Search II - Given an m x n board of characters and a list of strings words, return all words on the board. Each word must be constructed from letters of sequentially adjacent cells, where adjacent cells a
Leetcode212. Word Search II 题目 思路 复杂度 代码Leetcode212. Word Search II题目题目链接思路将词典构建为Trie, 对board中的每个字母,进行dfs遍历,检查是否在Trie中复杂度设词典最长词的长度为L,board有M行N列时间复杂度 O ( n ) \mathcal{O}(n) O(n) 最坏情况,board中的每个字母,向四个方向都能...
212. Word Search II 题目说明 Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adjacent cell, where “a...LeetCode 212. Word Search II 212. Word Search II Given a 2D board and a list...
voidinsert(string word) { TrieNode* p=root; for(inti=0;i<word.size();i++){ if(p->next[word[i]-'a'] == NULL) p->next[word[i]-'a']=newTrieNode(); p=p->next[word[i]-'a']; } p->isString=true; } // Returns if the word is in the trie. boolsearch(string word) ...
Each word must be constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used more than once in a word. Example 1: Input: board = [["o","a","a","n"],["e","t","a","e"],["i",...
*/ bool search(string word) { node* p = root; for(int i = 0; i < word.size(); i++) { if(!p->next[word[i] - 'a']) return false; p = p->next[word[i] - 'a']; } return p->flag == 1; } /** Returns if there is any word in the trie that starts with the ...
中实现的字典树来保存words,然后修改word search I中的代码,在dfs中保存路径字符串,如果该字符串是一个单词(通过search字典树实现)则加入result,如果该字符串是字典树的一个prefix,且则继续往下(四个方向)进行搜索,且这四个方向对应的二维数组中的位置,不能在这之前已被访问(即同一个位置,在一个word的搜索过程...
https://leetcode.com/problems/word-search-ii/ 最直观的思路就是对于每个word,都对board进行一次dfs搜索。这样在words太多的情况下会TLE. 这里考虑到board上有些point,对于任意word或者任意word的后缀都没有再继续搜索的必要,所以这里采用trie字典树存储所有带搜索的word。这样就只用dfs board一遍,就可以把所有的在...
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Leetcode 212 Word Search II 字典树 + 回溯 编程算法 Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The ...