#include <iostream>
#include <string>
using namespace std;

int main(int argc, char* argv[])
{
	int A,B;
	cin>>A>>B;
	if (A+1<=B){
		cout<<"YES"<<endl;
		cout<<B-A-1<<endl;
	}else{
		cout<<"NO"<<endl;
		cout<<A+1-B<<endl;
	}
	return 0;
}