#include <bits/stdc++.h>

using namespace std;

typedef unsigned long long ull;
typedef long long ll;

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