#include <bits/stdc++.h>
using namespace std;
int main(){
    int a, b;
    cin >> a >> b;
    int ans = 1e9;
    for(int i = 0; i <= a + b; i += 2){
        ans = min(ans, abs(a + b - 2 * i));
    }
    cout << ans << endl;
}