#include<bits/stdc++.h>

using namespace std;
using ll = long long;

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

    ll ans = 1LL<<60;
    for(ll i = 0;i <= min(a, b);++i){
        ll j = i;

        ll nat = i+j;
        ll unnat = a+b - nat;
        ans = min(ans, abs(nat - unnat));
    }

    cout << ans << endl;
}