#include <stdlib.h>
#include <stdio.h>
int factorial(int f)
{
    return f == 1 ? 1 : f*factorial(f-1);
}

int pow_(int num, int degree) {
    return degree == 1 ?  : num*pow_(num, degree-1);
}


void main() {
    printf("%d", pow_(2, 4));
}