func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   double arr[550];   int m;   int main() {     cin >> n >> m;     for (int i = 1; i <= n; i++) cin >> arr[i];     double ans = 0;     for (int i = 1; i <= m; i++) {       int u, v;       double w;       cin >> u >> v;       cin >> w;       double rr = (arr[u] + arr[v]) / w;       if (rr > ans) ans = rr;     }     printf( %.9lf n , ans);     return 0;   }   