【LeetCode】Word Search
来源:互联网 发布:ae mac破解版下载 编辑:程序博客网 时间:2024/06/05 16:17
参考链接
http://blog.csdn.net/doc_sgl/article/details/13008175题目描述
Word Search
Given a 2D board and a word, find if the word exists in the grid.
The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same letter cell may not be used more than once.
For example,
Given board =
[ ["ABCE"], ["SFCS"], ["ADEE"]]word =
"ABCCED"
, -> returns true
,word =
"SEE"
, -> returns true
,word =
"ABCB"
, -> returns false
.题目分析
总结
代码示例
class Solution {public: bool exist(vector<vector<char> > &board, string word) { int m = board.size(); if(m < 1) return false; if(word.size() < 1) return false; int n = board[0].size(); vector<vector<bool> > used(m, vector<bool>(n,false)); for(int i = 0;i<m;i++) { for(int j = 0;j<n;j++) { if(board[i][j] == word[0] && existCore(board,word,i,j,0,used)) return true; } } return false; } bool existCore(vector<vector<char> > &board, string word,int i,int j,int index,vector<vector<bool> > &used) { if(index == word.size())/////////////// return true; if(i<0 || i>=board.size() || j <0 || j>=board[0].size()) return false; if(used[i][j] || board[i][j] != word[index]) return false; used[i][j] = true; if(existCore(board,word,i+1,j,index+1,used)) return true;///// if(existCore(board,word,i-1,j,index+1,used)) return true;////// if(existCore(board,word,i,j+1,index+1,used)) return true;/////// if(existCore(board,word,i,j-1,index+1,used)) return true;////////// used[i][j] = false; return false; }};
bool dfs(vector<vector<char> > &board, int x, int y, string word){if(word.size() == 0)return true;bool flag = false;if(x-1>=0 && board[x-1][y] == word[0]){board[x-1][y] = '#';flag = dfs(board, x-1, y, word.substr(1));board[x-1][y] = word[0];}if(!flag && y-1>=0 && board[x][y-1] == word[0]){board[x][y-1] = '#';flag = dfs(board, x, y-1, word.substr(1));board[x][y-1] = word[0];}if(!flag && x+1<board.size() && board[x+1][y] == word[0]){board[x+1][y] = '#';flag = dfs(board, x+1, y, word.substr(1));board[x+1][y] = word[0];}if(!flag && y+1<board[0].size() && board[x][y+1] == word[0]){board[x][y+1] = '#';flag = dfs(board, x, y+1, word.substr(1));board[x][y+1] = word[0];}return flag;}bool exist(vector<vector<char> > &board, string word) { // Note: The Solution object is instantiated only once. if(word.size() < 1)return true;int row = board.size();int col = board[0].size();set<string> st;for(int i = 0; i < row; i++)for(int j = 0; j < col; j++)if(board[i][j] == word[0]){board[i][j] = '#';if(dfs(board,i,j,word.substr(1)))return true;board[i][j] = word[0];}return false; }
推荐学习C++的资料
C++标准函数库
http://download.csdn.net/detail/chinasnowwolf/7108919
在线C++API查询
http://www.cplusplus.com/
0 0
- LeetCode: Word Search
- [Leetcode] Word Search
- LeetCode : Word Search
- Leetcode: Word Search
- [LeetCode] Word Search
- leetcode 56: Word Search
- Leetcode 79 Word Search
- [leetcode ] word search
- [Leetcode] Word Search
- [LeetCode]Word Search
- Leetcode Word Search
- [leetcode]word search
- [leetcode] Word Search
- LeetCode-Word Search
- [LeetCode] Word Search
- LeetCode - Word Search
- leetcode word search
- LeetCode:Word Search
- Linux中断(interrupt)子系统之三:中断流控处理层
- ovs处理openflow消息的流程
- Linux中断(interrupt)子系统之四:驱动程序接口层 & 中断通用逻辑层
- C++格式化输出
- Linux中断(interrupt)子系统之五:软件中断(softIRQ)
- 【LeetCode】Word Search
- 如何用cmd关闭打开的程序
- 数据结构-----约瑟夫环问题
- 虚拟机内存不够时,导致的机器启不来解决方法
- ubuntu上安装lamp服务
- 数据结构 栈
- linux常用命令
- 大型网站技术架构(七)--网站的可扩展性架构
- strcpy、strcmp原型实现