Problem:
Unique

For a sequence of integers $A = \{a_0, a_1, ..., a_{n-1}\}$ which is sorted by ascending order, eliminate all equivalent elements.

Input

A sequence is given in the following format.

$n$
$a_0 \; a_1 \; ,..., \; a_{n-1}$

Output

Print the sequence after eliminating equivalent elements in a line. Separate adjacency elements by a space character.

Constraints

$1 \leq n \leq 100,000$

$-1000,000,000 \leq a_i \leq 1,000,000,000$

$a_0 \leq a_1 \leq ... \leq a_{n-1}$

Sample Input 1

4
1 2 2 4

Sample Output 1

1 2 4

Solution in Ruby (judge verdict: Accepted)

gets;puts gets.split.map(&:to_i).uniq*" "