#include<iostream>
using namespace std;
int main(){
	int64_t X,Y;
	cin>>X>>Y;
	int64_t x=0,y=0;
	int64_t ans=0;
	if(X==Y){
		ans++;
		cout<<ans<<endl;
		return 0;
	}else{
		ans+=2;
		cout<<ans<<endl;
		return 0;
	}
}