#include<iostream>
using namespace std;

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