Detect Duplicates in a List

Given a sequence of integers, your task is to determine if the list contains any duplicate values. In other words, if any number appears at least twice, print True; otherwise, print False.

Efficiency matters, so consider optimal techniques when checking for duplicates.

For example, using a set to track seen numbers is an effective approach.

inputFormat

The first line contains a single integer \(n\), representing the number of elements in the sequence.

The second line contains \(n\) space-separated integers.

outputFormat

Output a single line with True if there exists at least one duplicate in the sequence, or False if all elements are distinct.

5
1 2 3 4 5

False