#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;

void fast_io() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
}

int main(void) {
    fast_io();
    ll a, b;
    cin >> a >> b;
    ll m = min(a, b);
    ll ans = 2e18;
    for (int i = 0; i < m; i++) {
        ans = min(ans, abs(2 * i - (a + b - 2 * i)));
    }
    cout << ans << endl;
    return 0;
}