NEW OR EXISTING ID 2 Solution

Problem Statement

Given an array of integers, return a list of IDs that already exist in the array more than once.

Example 1

Input

[1, 2, 3, 2, 4, 5, 2]

Output

[2]

Explanation: Step-by-step: We initialize an empty list to store duplicate IDs. We iterate through the input array. For each number, we check if it exists in the array more than once by counting its occurrences. If it does, we add it to our list of duplicate IDs. Finally, we return the list of duplicate IDs.

Example 2

Input

[1, 1, 2, 2, 3, 3, 4, 4]

Output

[1, 2, 3, 4]

Explanation: Step-by-step: We initialize an empty list to store duplicate IDs. We iterate through the input array. For each number, we check if it exists in the array more than once by counting its occurrences. If it does, we add it to our list of duplicate IDs. Finally, we return the list of duplicate IDs.

Problem Statement

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Output

Input

Output

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