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

const long long INF = 1LL << 60;
#define MOD 1000000007;

typedef long long ll;

#define writeln(n) cout<<n<<endl;

typedef pair<int, int> P;

typedef pair<string, int> Psi;


int main() {

	int a,b;
	cin>>a>>b;

	if(a+1 <=b ){
		writeln("YES");
	}else {
		writeln("NO");
	}

	writeln(abs(a+1-b));
}