#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main(void){
    int a,b,ans;
    cin>>a>>b;
    a=a+1;
    ans=abs(a-b);
    if(ans==0 || a<=b){
        cout<<"YES"<<endl;
    }else{
    cout<<"NO"<<endl;
    }
    cout<<ans<<endl;
}