#include <bits/stdc++.h>
using namespace std;
///525- vector carcateristic
int fr[1000]= {0} ;///0..999
              int x,i,n;
int a=-1,b=-1;

int main()
{
  ///citire
  cin>>n;
  for(i=1; i<=n; i++)
  {
    cin>>x;
    if(x<1000)fr[x]=1;
  }
  ///prelucrare
  for(i=999; i>=100 && a==-1; --i)
    if(fr[i]==0)
    {
      if(b==-1) b=i;
      else if(a==-1)a=i;
    }
   ///afisare
   if(a==-1) cout<<"NU EXISTA";
   else cout<<a<<' '<<b;
  return 0;
}