#include <stdio.h>

int main()
{
    int a, b;
    scanf("%d%d", &a, &b);
    int c = a ^ b;
    int c1 = c, count = 0;
    for (int i = 0; i < 32; i++)
    {
        if ((c >> i) & 1)//最后一位为1
            count++;

    }
    printf("%d", count);
    return 0;
}