@@ -0,0 +1,763 @@
+import java.io.*;%0Aimport java.util.*;%0A%0Apublic class Solution %7B%0A%0A    public static void main(String%5B%5D args) %7B%0A        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */%0A        Scanner scanner = new Scanner(System.in);%0A        int n = scanner.nextInt();%0A        scanner.nextLine();%0A        List%3CString%3E users = new ArrayList%3CString%3E();%0A        while (n--%3E0) %7B%0A            String%5B%5D row = scanner.nextLine().split(%22 %22);%0A            if (row%5B1%5D.matches(%22%5E.*@gmail.com$%22)) %7B%0A                users.add(row%5B0%5D);%0A            %7D%0A        %7D%0A        String%5B%5D _users = users.toArray(new String%5B%5D%7B%7D);%0A        Arrays.sort(_users);%0A        for (String v : _users) System.out.println(v);%0A        scanner.close();%0A    %7D%0A%7D%0A

Create Day_28_RegEx_Patterns_and_Intro_to_Databases.java