#include <bits/stdc++.h>
using namespace std;
int main() {
	int x, y;
    cin >> x >> y;
    if (x == 0 && y == 0) cout << 0 << endl;
    else if (x == y) cout << 1 << endl;
    else if (x == 0 || y == 0) cout << 1 << endl;
    else cout << 2 << endl;
}