#include<string>
#include<iostream>
using namespace std;
int main()
{
	// a 男
	// b 女
	int a, b;
	cin >> a >> b;
	a = a + 1;

	if (a - 1 > b) {
		cout << "No" << "\n";
		cout << abs(a - b);
	}else {
		cout << "Yes" << "\n";
		cout << abs(b - a);
	}
	return 0;
}