# include <iostream>
# include <iomanip>
# include <algorithm>

using namespace std;


int main()
{
    int gx, gy;
    cin >> gx >> gy;
    int ans = 0;
    if (gx == 0 && gy == 0) {
        ans = 0;
    } else if (gx == gy || gx==0 || gy == 0) {
        ans = 1;
    } else {
        ans = 2;
    }
    cout << ans << endl;
}