OJ-Problems-Source/HDOJ/1151_autoAC.cpp
2016-08-13 10:51:15 +08:00

45 lines
882 B
C++

#include<cstring>
#include<cstdio>
#include<cstdlib>
using namespace std;
int const maxn=122;
int n,m;
bool mat[maxn][maxn];
bool vis[maxn];
int mac[maxn];
bool match(int x)
{
for(int i=1;i<=m;i++)
{
if(mat[x][i]&&!vis[i]){
vis[i]=1;
if(!mac[i]||match(mac[i])){
mac[i]=x;
return 1;
}
}
}
return 0;
}
int main(){
int a,b;
int test;
scanf("%d",&test);
while(test--){
scanf("%d%d",&m,&n);
memset(mat,0,sizeof(mat));
memset(mac,0,sizeof(mac));
for(int i=0;i<n;i++){
scanf("%d%d",&a,&b);
mat[a][b]=1;
}
int ans=0;
for(int i=1;i<=m;i++){
memset(vis,0,sizeof(vis));
if(match(i))ans++;
}
printf("%d\n",m-ans);
}
return 0;
}