#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int a,b;cin >> a >> b;
	if(a+1==b){
		cout << "YES" << endl;
		cout << 0 << endl;
	}
	else if(a+1<b){
		cout << "YES" << endl;
		cout << b-(a+1) << endl;
	}
	else{
		cout << "NO" << endl;
		cout << a+1-b << endl;
	}
}