int Count(int c)
{
int i = 0;
int count = 0;
for (i = 0; i < 32; i++)
{
if (c & 1 == 1)
{
count++;
}
c = c >> 1;
}
return count;
}
int main()
{
int a = 0;
int b = 0;
scanf("%d %d", &a, &b);
int c = a ^ b;
int ret = Count(c);
printf("%d", ret);
return 0;
}