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

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