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


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
	
	ll X,Y;
	cin>>X>>Y;
	if(X==0&&Y==0)cout<<0<<endl;
	else if(X==0||Y==0||X+Y==0||X-Y==0)cout<<1<<endl;
	else cout<<2<<endl;
}