#include<iostream>
using namespace std;

int main()
{
	int A, B; //A_boy,B_girl
	while (1)
	{
		cin >> A;
		cin >> B;

		if (A < B)
		{
			cout << "Yes" << endl;
			cout << 0;
		}
		else
		{
			A = A + 1 - B;
			cout << "No" << endl;
			cout << A;
		}
	}
	return 0;
}