Problem:
Score : 400 points

Problem Statement

Let {\rm comb}(n,r) be the number of ways to choose r objects from among n objects, disregarding order.
From n non-negative integers a_1, a_2, ..., a_n, select two numbers a_i > a_j so that {\rm comb}(a_i,a_j) is maximized.
If there are multiple pairs that maximize the value, any of them is accepted.

Constraints

2 \leq n \leq 10^5

0 \leq a_i \leq 10^9

a_1,a_2,...,a_n are pairwise distinct.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

n
a_1 a_2 ... a_n

Output

Print a_i and a_j that you selected, with a space in between.

Sample Input 1

5
6 9 4 2 11

Sample Output 1

11 6

\rm{comb}(a_i,a_j) for each possible selection is as follows:

\rm{comb}(4,2)=6

\rm{comb}(6,2)=15

\rm{comb}(6,4)=15

\rm{comb}(9,2)=36

\rm{comb}(9,4)=126

\rm{comb}(9,6)=84

\rm{comb}(11,2)=55

\rm{comb}(11,4)=330

\rm{comb}(11,6)=462

\rm{comb}(11,9)=55

Thus, we should print 11 and 6.

Sample Input 2

2
100 0

Sample Output 2

100 0

Solution in Java7 (OpenJDK 1.7.0) (judge verdict: Accepted)

import java.util.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long n;
    n = sc.nextLong();

    ArrayList<Long> arr = new ArrayList<Long>();

    for (int i = 0; i < n; i++) {
      long num = sc.nextLong();
      arr.add(num);
    }

    Collections.sort(arr);
    long max = arr.get(arr.size() - 1);
    long pair = max / 2;
    long max2 = pair;
    long diff = Long.MAX_VALUE;
    for (int i = 0; i < arr.size() - 1; i++) {
      long temp = arr.get(i);
      long min = Math.min(Math.abs(pair - temp), Math.abs(pair - max + temp));
      if (diff > min) {
        max2 = temp;
        diff = min;
      }
    }
    System.out.println(max + " " + max2);
  }
}