#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll inf=155550555555555;
ll mod=1000000007;
int main(){
    ll a,b;
    cin >> a >> b;
    ll ans=inf;
    for (ll i = 0; i <=a; i++)
    {
        for (ll j = 0; j <=b; j++)
        {
            if (i>b||j>a)
            {
                continue;
            }
            if (i+b-j!=b||j+a-i!=a)
            {
                continue;
            }
            ans=min(ans,abs(i+j-(a+b)+i+j));
        }
    }
    cout << ans << endl;
}