#include <bits/stdc++.h>
using namespace std;

int main(void)
{
  int a, b;
  cin >> a >> b;

  if (a > b)
  {
    cout << "NO" << endl;
    cout << a - b + 1 << endl;
  }
  else if (a < b)
  {
    cout << "YES" << endl;
    cout << b - (a + 1) << endl;
  }
  else
  {
    cout << "NO" << endl;
    cout << 1 << endl;
  }
  return 0;
}