#include <bits/stdc++.h>

using namespace std;

int main()
{
    int a, b;
    scanf("%d%d", &a, &b);
    int ans = a + b;

    for (int i = 1; i <= min(a, b); i++)
    {
        int x = a + b - i * 2;
        int y = i * 2;
        ans = min(ans, abs(x - y));
    }

    printf("%d\n", ans);
    return 0;
}