车型性能评测

奶牛的比赛

奶牛的比赛 描述 FJ的N(1 #define F(a,b,c)for(int a=b;a>n>>m; memset(v,0,sizeof v); F(i,1,m)cin>>x>>y,v[x][y]=1; F(k,1,n)F(i,1,n)F(j,1,n)if(v[i][k]&&v[k][j])v[i][j]=1; F(i,1,n){ c=0;