#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){
        for(ll j = 0;j <= min(a, b);++j){
            if(a-i != b-j) continue;
            ll nat = i+j;
            ll unnat = (b-i) + (a-j);
            ans = min(ans, abs(nat - unnat));
        }
    }

    cout << ans << endl;
}