Step 8 of 12 · Sets

Keep unique values

BeginnerJavaScript1,000 ms

Problem

Read a list of whole numbers and return each value only the first time it appears, preserving the original order.

Input

The first line contains n. The second line contains n space-separated integers.

Output

The unique values in their original order, separated by one space.

Examples

Input
7
4 2 4 3 2 3 9
Output
4 2 3 9

Only the first appearance of each value remains.

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Define solve(input) and return the exact output. Network access is blocked and the runner stops after 1,000 ms. Run the example to inspect local console.log output.

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