P1550 [USACO08OCT]Watering Hole G
//可能是要选几个点呀
//增加一个超级起源点,把那些零散的树进行相互连接
#include <bits/stdc++.h>
using namespace std;
const int M=305;
struct Edge {
int u,v,w;
bool operator<(const Edge T)const {
return w<T.w;
}
}a[M*M];
int tot;
int fa[M];
int find(int x) {
return x==fa[x]?fa[x]:fa[x]=find(fa[x]);
}
int main() {
int n;cin>>n;
for(int i=1;i<=n+1;i++)fa[i]=i;
for(int i=1;i<=n;i++) {
int x;cin>>x;
a[++tot]={n+1,i,x};
}
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++) {
int x;cin>>x;
a[++tot]={i,j,x};
}
sort(a+1,a+1+tot);
int sum=0;
for(int i=1;i<=tot;i++) {
int fx=find(a[i].u),fy=find(a[i].v);
if(fx!=fy)fa[fx]=fy,sum+=a[i].w;
}
cout<<sum;
return 0;
}
标签:USACO08OCT,int,Watering,tot,P1550,Hole
From: https://www.cnblogs.com/basicecho/p/16890898.html