#include <iostream>

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