#include<iostream>
using namespace std;
int A,B;
int main()
{
	cin>>A>>B;
	int ans=1e9;
	for(int k=0;k<=A&&k<=B;k++)
	{
		ans=min(ans,abs((k+(A-(A-k)))-((A-k)+(B-k))));
	}
	cout<<ans<<endl;
}