#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
using vi = vector<i64>;
using vvi = vector<vi>;

int main() {
    int a, b;
    cin >> a >> b;
    cout << (b - a > 0 ? "YES" : "NO") << endl;
    cout << abs(b - (a + 1)) << endl;
}