#include <fstream>
#include <iostream>
#include <string>


int main() {

	//std::ifstream inf("Text.txt");	std::cin.rdbuf(inf.rdbuf());

	int A, B;
	std::cin >> A >> B;

	if (B - A == 1) {
		std::cout << "YES" << std::endl;
	}
	else {
		std::cout << "NO" << std::endl;
	}

	if (A < B) {
		std::cout << B - A - 1 << std::endl;
	}
	else if (A > B) {
		std::cout << A - B + 1 << std::endl;
	}
	else {
		std::cout << '1' << std::endl;
	}

	return 0;

}