#include<stdio.h>
int count_num_1(int n1, int n2) {
    int count = 0;
    int n3 = n1 ^ n2;


    int i;
    for (i = 0; i <= 31; i++) {
        if (((n3 >> i) & 1) == 1)
            count++;
    }







    return count;
}





int main() {
    int n1, n2;
    scanf("%d%d", &n1, &n2);
    int num = count_num_1(n1, n2);
    printf("%d", num);

    return 0;
}