标签:
| Time Limit: 1000MS | Memory Limit: 65536K | |
| Total Submissions: 16854 | Accepted: 4567 |
Description
Input
Output
Sample Input
3 3 0 1 0 0 0 1 1 0 0 4 4 0 0 0 1 1 0 0 0 1 1 0 1 0 1 0 0
Sample Output
Yes, I found it It is impossible
#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<algorithm>
#include<cstdlib>
#include<queue>
#include<vector>
#include<stack>
using namespace std;
int n,m,mp[305][305],vis[305];
bool check()
{
for(int i=0;i<m;i++)
if(vis[i]!=1)
return false;
return true;
}
bool ok()
{
for(int i=0;i<m;i++)
{
if(vis[i]>1)
return false;
}
return true;
}
bool dfs(int x)
{
if(check())
return true;
for(int i=x;i<n;i++)
{
for(int j=0;j<m;j++)
{
vis[j]+=mp[i][j];
}
if(ok())
{
if(dfs(i+1))
return true;
}
for(int j=0;j<m;j++)
{
vis[j]-=mp[i][j];
}
}
return false;
}
int main()
{
while(scanf("%d%d",&n,&m)!=EOF)
{
memset(vis,0,sizeof(vis));
for(int i=0;i<n;i++)
{
for(int j=0;j<m;j++)
scanf("%d",&mp[i][j]);
}
if(dfs(0))
{
printf("Yes, I found it\n");
}
else
printf("It is impossible\n");
}
return 0;
}
标签:
原文地址:http://www.cnblogs.com/a972290869/p/4430041.html