//acmp.ru 0692 binarnie_cisla.cpp 8%

#include <stdio.h>
#include <math.h>
int main(){
	freopen("INPUT.TXT", "r", stdin);
	freopen("OUTPUT.TXT", "w", stdout);

	unsigned int N;
	scanf("%i", &N);
	for (int i = 0; i <= 32; i++){
		if(log2(N) == i){
			printf("YES");
			return 0;
		}
	}
	printf("NO");
	return 0;
}