Add solution for Challenge 3 by SemenTretyakov

[SemenTretyakov]

Challenge 3 Solution

Submitted by: @SemenTretyakov
Challenge: Challenge 3

Description

This PR contains my solution for Challenge 3.

Changes

• Added solution file to challenge-3/submissions/SemenTretyakov/solution-template.go

Testing

• Solution passes all test cases
• Code follows Go best practices

Thank you for reviewing my submission! 🚀

[coderabbitai]

Walkthrough

A new Go solution file is introduced implementing an in-memory employee management system with Employee and Manager types, providing methods to add, remove, retrieve, and compute average salary of employees. The implementation includes a main function demonstrating basic usage of the system.

Changes

Cohort / File(s)	Summary
Employee Management Solution challenge-3/submissions/SemenTretyakov/solution-template.go	New file with Employee struct (ID, Name, Age, Salary) and Manager struct containing slice of employees. Implements four methods on Manager: AddEmployee (appends employee), RemoveEmployee (removes by ID), GetAverageSalary (returns average or 0 if empty), and FindEmployeeByID (returns pointer or nil). Main function demonstrates usage with two employees added, one removed, and salary computation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Add solution for Challenge 3 by Be1chenok #581: Adds identical Employee and Manager types with the same four CRUD methods to a different submission file.
• Add solution for Challenge 3 by kiramux #663: Implements the same Employee and Manager types and public methods (AddEmployee, RemoveEmployee, GetAverageSalary, FindEmployeeByID) in challenge-3 solution file.
• Add solution for Challenge 3 by 0xtrooper #879: Introduces the same in-memory employee management system with identical types and methods in a different submission location.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Add solution for Challenge 3 by SemenTretyakov' accurately describes the main change, which is adding a new solution file for Challenge 3. It is clear, specific, and directly related to the changeset.
Description check	✅ Passed	The description is directly related to the changeset, providing context about the Challenge 3 solution submission and listing the specific file added. It adequately describes the change despite minimal detail.

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