#include <bits/stdc++.h>
using namespace std;
int main () {
    int a, b;
    cin >> a >> b;
    int ans = 1e9 + 7;
    for (int c = 0; c <= min(a, b); c ++) {
        ans = min(ans, abs(c * 2 - (a - c + b - c)));
    }
    cout << ans << endl;
}