#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>
#include <queue>
#include <set>
#include <map>
#include <limits>
#include <cmath>
#include <iomanip>
#include <functional>
#include <random>
#include <set>
using namespace std;
using ll = long long;

int main()
{
    // 整数の入力
    ll A,B;
    cin >> A >> B;
    ll ans = numeric_limits<ll>::max();
    for(int i = 0;i <= A;i++){
        ll aA = i;
        ll aB = A-i;
        ll bA = B-aA;
        ll bB = A-aB;
        if (aA >= 0 && aB >= 0 && bA >= 0 && bB >= 0){
            ll good = aA + bB;
            ll bad = aB + bA;
            ans = min(ans,abs(good-bad));
        }
    }
    cout << ans << endl;
    return 0;
}