func_code_string: #include <iostream>      int main(void) {    int count;    std::cin >> count;    for (int i = 0; i < count; ++i) {     int number;     std::cin >> number;     int64_t sum = 0;     for (int j = 0; j < number; ++j) {      int part;      std::cin >> part;      sum += part;     }     std::cout << (sum % number) * (number - sum % number) <<   n ;    }    return 0;   }   