#include<iostream>
#include<algorithm>
#include<cmath>
using namespace std;
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;
}