task5

#include <stdio.h>

int main()
{
    int n;
    scanf("%d", &n);
    int i = 1;
    while (i<n)
    {
        i*=2;
    }
    if(i == n)
    {
        printf("%d is a power of 2", n);
    }else
    {
        printf("%d is not a power of 2", n);
    }
    return 0;
}