医院设置40分求调

#include <bits/stdc++.h>
#define ll long long
#define c1 cout << 1 << " "
#define cen cout << endl
using namespace std;
void f(){

}
int d[109][109];
int num[109];
int main(){
	int n;
	cin >> n;
	int b,c;
	for(int i=0;i<n;i++){
		cin >> num[i] >> b >> c;
		b--;c--;
		if(b!=-1) d[b][i]=d[i][b]=1;
		if(c!=-1) d[i][c]=d[c][i]=1;
	}
	for(int k=0;k<n;k++){
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				if(d[i][k]&&d[k][i]){
					d[i][j]=min((d[i][j]?d[i][j]:INT_MAX),d[i][k]+d[k][j]);
				}
			}
		}
	}
	int minn=INT_MAX;
	for(int i=0;i<n;i++){
		int sum=0;
		for(int j=0;j<n;j++){
			if(i!=j){
				sum+=num[j]*d[i][j];
			}
		}
		minn=min(minn,sum);
	}
	cout << minn;
	return 0;
}	

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