#include<bits/stdc++.h>
using namespace std;

int main() {
	int a, b; cin >> a >> b;
	if(a + 1 <= b) {
		cout << "YES" << '\n';
		cout << b - (a + 1) << '\n';
	} else {
		cout << "NO" << '\n';
		cout << (a + 1) - b << '\n';
	}
	return 0;
}