#include"bits/stdc++.h"
//#include<bits/stdc++.h>
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
typedef long long ll;
const ll mod = 20000000;

int d[52][52];
int n;

void warshall_floyd() {
	rep(k, 0, n) {
		rep(i, 0, n) {
			rep(j, 0, n) {
				d[i][j] = min(d[i][j], d[i][k] + d[k][j]);
			}
		}
	}
}

int main() {
	int m;
	int s[52],a[52],b[52],c[52];
	cin >> n;
	rep(i, 0, n)cin >> s[i];
	cin >> m;
	rep(i, 0, m)cin >> a[i] >> b[i] >> c[i];
	rep(i, 0, m) {
		rep(j, 0, m) {
			if (i == j)d[i][j] = 0;
			else d[i][j] = mod;
		}
	}
	rep(i, 0, m) { d[a[i]][b[i]] = c[i]; d[b[i]][a[i]] = c[i]; }
	warshall_floyd();
	int ans = INT_MAX;
	rep(i, 1, n-1) {
		rep(j, 1, n-1) {
			if (i == j)continue;
			int cost = 0;
			cost = d[0][i] + d[i][j] + d[j][n - 1] + s[i] + s[j];
			ans = min(ans, cost);
		}
	}
	print(ans);
}