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

int main()
{
	int a,b;
	cin >>a>>b;
	if(a>=b){
		cout<<"NO"<<endl;
		cout<<a-b+1<<endl;
	}else{
		cout<<"YES"<<endl;
		cout<<b-a-1<<endl;
	}
	return 0;
}