#include <iostream>

int main()
{
	short man = 0, woman = 0;
	std::cin >> man;
	std::cin >> woman;

	if (man + 1 <= woman)
	{
		std::cout << "YES" << std::endl;
		std::cout << woman - (man + 1) << std::endl;
	}

	else
	{
		std::cout << "NO" << std::endl;
		std::cout << (man + 1) - woman << std::endl;
	}

	return 0;
}