#include <stdio.h>

int main() {
	int m = 0;
	int n = 0;
	scanf("%d %d", &m, &n);
	int count = 0;
    m = m ^ n;
	for (int i = 0;i < 32;i++) {
		if ((m >> i) & 1) {
			count++;
		}
	}
	printf("%d", count);
	return 0;
}