#include <stdio.h>

int main ( ) {
	unsigned int n = 32768;
	unsigned int power;
	for (power=1; power<=n; power=power*2) {
		if (n = power) {
			printf ("%u is a power of 2\n", n);
			return 0;
		}
	}
	printf ("%u is not a power of 2\n", n);
	return 0;
}