Help me in solving PPSC27B problem

My issue

solution of the problem

My code

#include <stdio.h>

int main() {
    int num = 15;
    
    //Complete the code
    printf("%d",1);

    return 0;
}

Learning course: Programming and Problem solving using C
Problem Link: https://www.codechef.com/learn/course/ciet-programming-c/CIETPC08/problems/PPSC27B