#include <bits/stdc++.h>
using namespace std;

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