#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a>>b;
	if(a%2==0 and b%2==0){
		cout<<2;
	}else if(a%2==0 or b%2==0){
		cout<<1;
	}else{
		cout<<0;
	}
	return 0;
}