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