#include <bits/stdc++.h>

#define REP(i ,n) for(int i=0 ;i < n; i++)
#define REPB(i ,n) for(int i=n; i >= 0; i--)
#define FOR(i ,m ,n) for(int i=m; i < n; i++)
#define FORB(i, m, n) for(int i=m; i>= m; i--)
#define ll long long
#define pb push_back
#define popb pop_back
using namespace std;
int main(){
  int a, b;
  cin >> a >> b;
  string ans = "NO";

  int k = b - (a + 1);

  if(k >= 0) ans = "YES";
  cout << ans << endl;
  cout << abs(k) << endl;
}