Set Basics: collection Without Duplicates

In this problem, you will create a program that adds multiple numbers to a HashSet to remove duplicates and displays the count of unique elements to standard output.

Learning Objective: Understand how to create a collection without duplicates using HashSet

Overview

Input multiple numbers and output the count of unique elements using HashSet.

Specifications

• Add numbers to HashSet
• Duplicates are automatically removed
• Output the final element count

Input

Line 1: Number of elements
Following lines: Each number

Output Format

Unique count: 3