Lonely Integer

This challenge involves finding the unique element in an array of integers where all other elements occur twice.

Problem Statement

Given an array of integers, where all elements but one occur twice, find the unique element.

Example:

a = [1, 2, 3, 4, 3, 2, 1]

The unique element is 4.

Function Description:

Complete the getLonelyInteger function to return the lonely integer.

Input Format:

The first line contains a single integer, n, the number of integers in the array. The second line contains n space-separated integers that describe the values in a.

Constraints:

• It is guaranteed that n is an odd number and that there is one unique element.
• 0 ≤ a[i] ≤ 100, where 0 ≤ i < n.

Getting Started

1. Clone the repository:

   npm install
   npm test