#include<stdio.h>
int main()
{
    int n;
    sacnf("%d",&n);
    if(n>10)
    {
        printf("Invalid input\n");
    }
    if(n%2==0)
    return even;
    even=a+b;
    c=even;
    else 
    return odd
    odd=a+b;
    c=odd
    return 0;
}