#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int A, B;
  cin >> A >> B;
  if (A + 1 <= B) {
    cout << "YES" << '\n';
    cout << abs(B - (A + 1)) << '\n';
  } else {
    cout << "NO" << '\n';
    cout << A - B + 1 << '\n';
  }
  return 0;
}