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

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