#include <bits/stdc++.h>
using namespace std;
int main()
{
  int a,b,sum;
  cin >> a >> b;
  sum = b-a;
  if(0 < sum){
    cout << "YES" << endl << sum-1 << endl;
  } else {
    cout << "NO" << endl << abs(sum)+1 << endl;
  }
  return 0;
}