#include <iostream>
#include <cmath>
using namespace std;

int main() {
    long long Gx, Gy;
    cin >> Gx >> Gy;

    if (Gx == 0 && Gy == 0) {
        cout << 0 << endl;
    }
    else if (Gx == Gy || Gx == -Gy) {
        cout << 1 << endl;
    }
    else if ((Gx + Gy) % 2 == 0) {
        cout << 2 << endl;
    }
    else {
        cout << 2 << endl;
    }

    return 0;
}