Extract Unique Elements in Order

Given an array of integers, your task is to output the unique elements in the order they first appeared. For an input array $A = [a_1, a_2, \ldots, a_n]$, you need to find the sequence $B$ such that each element in $B$ appears only once and in the order of their appearance in $A$.

For example, if the input array is [3, 4, 3, 2, 4, 5], the output should be [3, 4, 2, 5].

inputFormat

The first line of input contains a single integer $N$, denoting the number of elements in the array. The second line contains $N$ space-separated integers representing the array elements.

outputFormat

Output the unique elements in the order they appear in the array. Print the numbers separated by a space.## sample

6
3 4 3 2 4 5

3 4 2 5