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

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main() {
	int gx, gy;
	cin >> gx >> gy;
	if(gx == 0 && gy == 0) cout << 0 << endl;
	else {
		int ans = 1e9, ans1 = 0;
		if(gx == 0 || gy == 0) ans = 1;
		else ans = 2;
		if(gx == gy || gx + gy == 0) ans1 = 1;
		else ans1 = 2;
		cout << min(ans, ans1) << endl;
	}
}