Added Java Problem Solution for Stdin and Stdout at Hackerrank Platform

[S-YED]

Closing Issue/Referencing Issue

Completed The Problem

Pull Request Description

This pull request addresses and resolves the problem referenced in the issue by adding a solution for the "Java Stdin and Stdout I" challenge on HackerRank. You can find the problem statement here.

Changes Made In Pull Request

1. Implemented the solution to the HackerRank problem in the Solution.java file located in the Hackerrank directory.
2. Ensured the solution meets the problem's requirements for handling input and output correctly.
3. Tested the code to ensure functionality and accuracy with sample test cases.

This update completes the requested solution, improving the overall repository with the solved Java problem.

[welcome]

I can tell this is your first pull request! Thank you I'm so honored. 🎉🎉🎉
I'll take a look at it ASAP!