func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   int a[200001];   int b[200001];   int main() {     cin >> n;     int tong = 0;     int i;     for (i = 1; i <= n; i++) cin >> a[i], tong += a[i];     int k = 1;     i = 1;     bool ok = true;     while (i <= n) {       if (tong % n == 0 && a[i] == tong / n) {         b[k] = i;         k++;         ok = false;       }       i++;     };     if (ok) {       cout << 0 << endl;       return 0;     }     cout << k - 1 << endl;     for (i = 1; i < k; i++) cout << b[i] <<    ;     return 0;   }   