#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int main(){
    int a,b;
    cin>>a>>b;
    int ans = 1e9;
    for(int i = 0;i<=a;i++){
        for(int j = 0;j<=b;j++){
            if(i>b||j>a) continue;
            if(i+a-j!=b) continue;
            if(j+b-i!=a) continue;
            int good = i + j;
            int bad = a - i + b - j;
            ans = min(ans,abs(good-bad));
        }
    }
    cout<<ans<<endl;
}