func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     float sum = 0;     cin >> n;     int k[n], count = 0;     float a[n];     for (int i = 1; i <= n; i++) cin >> a[i];     for (int i = 1; i <= n; i++) sum += a[i];     for (int i = 1; i <= n; i++) {       if ((sum - a[i]) / (n - 1) == a[i]) {         count++;         k[count] = i;       }     }     if (count > 0) {       cout << count << endl;       for (long long int i = 1; i <= count; i++) cout << k[i] <<    ;     } else       cout << 0;     return 0;   }   