Read an array and print only the unique values, in the order they first appeared, space-separated.
Input / Output
Input: first line N, second line N space-separated integers. Output: unique values, in first-seen order, space-separated.
Examples
Input
6 1 2 2 3 1 4
Expected Output
1 2 3 4
Input
5 5 5 5 5 5
Expected Output
5
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