func_code_string: #include <bits/stdc++.h>   using namespace std;   double x[100000];   int main() {     ios_base::sync_with_stdio(false);     int n, m;     cin >> n >> m;     for (int i = 1; i <= n; i++) cin >> x[i];     double ans = 0;     for (int i = 1; i <= m; i++) {       int fi, se, we;       cin >> fi >> se >> we;       ans = max(ans, (x[fi] + x[se]) / (double)(we));     }     if (n == 1) {       cout <<  0.0000000000  << endl;       return 0;     }     cout << fixed << setprecision(10) << ans << endl;   }   