#include <iostream>
#include <stdarg.h>

// function with variable number of arguments (...)
int sum (int stev, ...) {
    va_list args; // variable arguments list
    int arg;
    int k, vsota=0;
    va_start(args, stev); //set the last parameter before variable arguments list
    for (k=0; k<stev; k++) {
        arg = va_arg(args, int); // take one argument from variable arguments list
        vsota += arg;
    }
    va_end(args); //End using variable argument list
    return vsota;
}

int main() {
    std::cout << sum(5, 10, 20, 30, 40, 50) << std::endl;
    std::cout << sum(3, 11, 12, 13) << std::endl;
    return 0;
}