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