79求调

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=1e5+10;
int n,m,ans,res,p[N];
struct Edge{
	int x,y,z;
}e[N];
const bool cmp(Edge x,Edge y){
	return x.z<y.z;
}
int get_p(int x){
	return x==p[x]?x:p[x]=get_p(p[x]);
}
void Kruskal(){
	res=n;
	sort(e+1,e+1+m,cmp);
	for(int i=1;i<=n;i++){
		p[i]=i;
	}
	for(int i=1;i<=m;i++){
		int x=e[i].x,y=e[i].y;
		x=get_p(x);
		y=get_p(y);
		if(x!=y){
			res--;
			ans+=e[i].z;
			p[x]=y;
		}
	}
}
signed main(){
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		int x,y,z;
		cin>>e[i].x>>e[i].y>>e[i].z;
	}
	Kruskal();
	if(res==1) cout<<ans;
	else cout<<"orz";
	return 0;
}