#include <iostream>
using namespace std;

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