func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       long long ar[n];       for (int i = 0; i < n; i++) cin >> ar[i];       int maxi = -1000000001;       long long sum = 0;       for (int i = 0; i < n; i++) {         if (ar[i] > maxi) maxi = ar[i];         sum += ar[i];       }       float ans = (sum - maxi) / (float)(n - 1) + maxi;       printf( %.9f , ans);       cout << endl;     }   }   