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