#include <bits/stdc++.h>

int main(){
	long long x,y ;
	std::cin >> x >> y;
	
	if(x == 0 && y == 0)
		std::cout << 0 << std::endl;
	else if(x == y)
		std::cout << 1 << std::endl;
	else if(x == 0 || y == 0)
		std::cout << 1 << std::endl;
	else
		std::cout << 2 << std::endl;
}