OJ-Problems-Source/HDOJ/4185_autoAC.cpp

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#include<stdio.h>
#include<vector>
#include<string.h>
#include<algorithm>
using namespace std;
int map[700][700],p[700][700],vis[700],x[700],y[700],t,n,num,k;
char s[700][700];
bool search(int i)
{
int j;
for(j=0;j<num;j++)
{
if(map[i][j]&&!vis[j])
{
vis[j]=1;
if(!y[j]||search(y[j]))
{
y[j]=i;
x[i]=j;
return true;
}
}
}
return false;
}
int match()
{
memset(x,0,sizeof(x));
memset(y,0,sizeof(y));
int ans=0;
for(int i=0;i<num;i++)
{
memset(vis,0,sizeof(vis));
if(search(i)) ans++;
}
return ans/2;
}
int main()
{
scanf("%d",&t);
k=1;
while(t--)
{
int i,j;
num=0;
memset(map,0,sizeof(map));
scanf("%d",&n);
for(i=0;i<n;i++)
scanf("%s",s[i]);
for(i=0;i<n;i++)
for(j=0;j<n;j++)
if(s[i][j]=='#')
p[i][j]=num++;
for(i=0;i<n;i++)
for(j=0;j<n;j++)
{
if(s[i][j]=='#')
{
if(j<n-1&&s[i][j+1]=='#')
{
map[p[i][j]][p[i][j+1]]=1;
map[p[i][j+1]][p[i][j]]=1;
}
if(i<n-1&&s[i+1][j]=='#')
{
map[p[i][j]][p[i+1][j]]=1;
map[p[i+1][j]][p[i][j]]=1;
}
}
}
int p=match();
printf("Case %d: %d\n",k++,p);
}
return 0;
}