#include <bits/stdc++.h>
using namespace std;

int main()
{
	int a, b;
	cin >> a >> b;
	
	if(a == b)
	{
		if(a == 1) cout << 2 << endl;
		else cout << 0 << endl;
		return 0;
	}
	
	if(a < b) swap(a, b);
	int ans = 200;
	int c, d;
	for(int i = 0; i <= b; i++)
	{
		if(a - i < 0) continue;
		c = 2 * i; d = a + b - 2 * i;
		ans = min(ans, abs(c - d));
	}
	cout << ans << endl;
	return 0;
}