这个代码为什么过不了啊？

#include<iostream>
#include<algorithm>
using namespace std;
struct node {
	int x,y,v;
} edge[200005];
int pa[200005];
bool cmp(node x,node y) {
	return x.v<y.v;
}
int find(int x) {
	if(pa[x]==x) return x;
	return pa[x]=find(pa[x]);
}
void init(int n) {
	for(int i=1; i<=n; i++) {
		pa[i]=i;
	}
}
int main() {
	int n,m,ans=0,cnt=0,k;
	cin>>n>>m>>k;
	init(n);
	for(int i=1; i<=m; i++) {
		cin>>edge[i].x>>edge[i].y>>edge[i].v;
	}
	sort(edge+1,edge+1+n,cmp);
	for(int i=1; i<=m; i++) {
		int xx=find(edge[i].x);
		int yy=find(edge[i].y);
		if(xx!=yy) {
			pa[xx]=yy;
			ans+=edge[i].v;
			cnt++;
		}
		if(cnt>=n-k) {
			break;
		}
	}
	if(cnt>=n-k) cout<<ans;
	else cout<<"No Answer";
	cout<<ans<<" "<<n-k;
	return 0;
}