#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <string>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <stdio.h>
using namespace std;
#define int long long
int MOD = 1000000007;
signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int A, B;
	cin >> A >> B;
	if (A + 1 <= B) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}

	cout << abs(A + 1 - B) << endl;
}