@@ -0,0 +1,657 @@
+package com.github.conradoqg.studydsa.hackerrank.challenges.ctci;%0A%0Aimport java.util.Scanner;%0A%0Apublic class LonelyInteger %7B%0A    public static int lonelyInteger(int%5B%5D a) %7B%0A        int lonelyOne = 0;%0A        for (int nextNumber : a) %7B%0A            lonelyOne = lonelyOne %5E nextNumber;%0A        %7D%0A        return lonelyOne;%0A    %7D%0A%0A    public static void main(String%5B%5D args) %7B%0A        try (Scanner in = new Scanner(System.in)) %7B%0A            int n = in.nextInt();%0A            int a%5B%5D = new int%5Bn%5D;%0A            for (int a_i = 0; a_i %3C n; a_i++) %7B%0A                a%5Ba_i%5D = in.nextInt();%0A            %7D%0A            System.out.println(lonelyInteger(a));%0A        %7D%0A    %7D%0A%7D%0A

Add lonely integer CTCI challenge