int main()
{
int n = 0;
int m = 0;
int x = 0;
int y = 0;
int count = 0;
scanf("%d %d",&n,&m);
for (int i = 0; i < 32; i++)
{
x = n % 2;
n = n / 2;
y = m % 2;
m = m / 2;
if (x != y)
{
count++;
}
}
printf("%d",count);
return 0;
}

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