#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10, M = 2e5 + 10, INF = 0x3f3f3f3f;
int n, m;
int p[N];

struct Edge 
{
    int a, b, w;

    bool operator<(const Edge &e) const 
	{
        return w < e.w;
    }
} es[M];

int find(int x) 
{
    if (p[x] != x) p[x] = find(p[x]);
    return p[x];
}
void init(int n)
{
	for (int i = 1; i <= n; i++) p[i] = i;
}
int kruskal() 
{
    int cnt = 0, res = 0;

    sort(es, es + m);

    init(n);

    for (int i = 0; i < m; i++) 
	{
        int a = es[i].a, b = es[i].b, w = es[i].w;
        a = find(a), b = find(b);
        if (a != b) 
		{
            p[a] = b;
            res += w;
            cnt++;
        }
    }

    if (cnt < n - 1) return INF;
    else return res;
}

int main() 
{
    while(cin >> n )
    {
    	if(n==0)break;
    	m=n*(n-1)/2;
    	for (int i = 0; i < m; i++) 
		{
        	int a, b, w,c;
        	scanf("%d%d%...