#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b;
    cin>>a>>b;
    if(a-b==0)
    cout<<"NO"<<endl<<1<<endl;
    else if(a-b>0)
    cout<<"NO"<<endl<<a-b+1<<endl;
    else
    cout<<"YES"<<endl<<b-a-1<<endl;
}