#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long
using namespace std;
int main() {
	int a,b,ans;
	cin >> a>>b;
	if (a >= b) {
		ans = a - b+1;
		cout << "NO" << endl;
		cout << ans << endl;
		
	}
	else {
		ans = b - (a + 1);
		cout << "YES" << endl;
		cout << ans << endl;
		
	}

	return 0;
}