#include <stdio.h>

int bitCount(int n) {
	int contor = 0, y;
	
	while (n) {
		y = n & (-n);
		n -= y;
		contor++;
	}
	
	return contor;
}

int main() {

	int n;
	scanf("%d", &n);
	
	printf("%d", bitCount(n));
	
	return 0;
}