#include <iostream>

using namespace std;
int main()
{
	short A,B;
	cin >> A;
	cin >> B;

	if (A + 1 <= B)
	{
		cout << "YES" << endl;
		cout << B - (A + 1) << endl;
	}

	else
	{
		cout << "NO" << endl;
		cout << (A + 1) - B << endl;
	}

	return 0;
}