#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;
    string ans;
    if(a>=b){
        ans="NO";
    }
    else{
        ans="YES";
    }
    cout<<ans<<endl;
    cout<<max(0,a-b+1)<<endl;
}