From 332a988f6471f1c66e7236f7ef0b9a3be19004f8 Mon Sep 17 00:00:00 2001
From: "go-interview-practice-bot[bot]"
 <230190823+go-interview-practice-bot[bot]@users.noreply.github.com>
Date: Sun, 16 Nov 2025 09:54:36 +0000
Subject: [PATCH] Add solution for Challenge 3

---
 .../submissions/yz4230/solution-template.go   | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 challenge-3/submissions/yz4230/solution-template.go

diff --git a/challenge-3/submissions/yz4230/solution-template.go b/challenge-3/submissions/yz4230/solution-template.go
new file mode 100644
index 000000000..5fce2a6f6
--- /dev/null
+++ b/challenge-3/submissions/yz4230/solution-template.go
@@ -0,0 +1,73 @@
+package main
+
+import "fmt"
+
+type Employee struct {
+	ID     int
+	Name   string
+	Age    int
+	Salary float64
+}
+
+type Manager struct {
+	Employees []Employee
+}
+
+// AddEmployee adds a new employee to the manager's list.
+func (m *Manager) AddEmployee(e Employee) {
+	m.Employees = append(m.Employees, e)
+}
+
+// RemoveEmployee removes an employee by ID from the manager's list.
+func (m *Manager) RemoveEmployee(id int) {
+    idx := -1
+	for i, e := range m.Employees {
+	    if e.ID == id {
+	        idx = i
+	        break
+	    }
+	}
+	if idx == -1 {
+	    return
+	}
+	next := make([]Employee, 0, len(m.Employees)-1)
+	next = append(next, m.Employees[:idx]...)
+	next = append(next, m.Employees[idx+1:]...)
+	m.Employees = next
+}
+
+// GetAverageSalary calculates the average salary of all employees.
+func (m *Manager) GetAverageSalary() float64 {
+    if len(m.Employees) == 0 {
+        return 0.0
+    }
+	sum := 0.0
+	for _, e := range m.Employees {
+	    sum += e.Salary
+	}
+	return sum / float64(len(m.Employees))
+}
+
+// FindEmployeeByID finds and returns an employee by their ID.
+func (m *Manager) FindEmployeeByID(id int) *Employee {
+	for i := range m.Employees {
+	    if m.Employees[i].ID == id {
+	        return &m.Employees[i]
+	    }
+	}
+	return nil
+}
+
+func main() {
+	manager := Manager{}
+	manager.AddEmployee(Employee{ID: 1, Name: "Alice", Age: 30, Salary: 70000})
+	manager.AddEmployee(Employee{ID: 2, Name: "Bob", Age: 25, Salary: 65000})
+	manager.RemoveEmployee(1)
+	averageSalary := manager.GetAverageSalary()
+	employee := manager.FindEmployeeByID(2)
+
+	fmt.Printf("Average Salary: %f\n", averageSalary)
+	if employee != nil {
+		fmt.Printf("Employee found: %+v\n", *employee)
+	}
+}