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

int main()
{
	int a, b;
	cin >> a >> b;

	int nma = min( a, b ) * 2;
	int ans = a + b;
	for( int i = 0; i <= nma; i++ ) {
		int r = a + b - i;
		ans = min( ans, abs( i - r ) );
	}
	cout << ans << endl;
}