#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
using PL = pair<ll, ll>;
// Welcome to my source code!

int main() {
    int a, b;
    cin >> a >> b;
    if (a < b) cout << "YES\n" << b - a - 1 << endl;
    else cout << "NO\n" << a - b + 1 << endl;
}