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

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

}