import java.util.*; // Import for Map and Entries

public class PhonebookMap { // Define class for associative data mapping
    public static void main(String[] args) { // Program entry point
        System.out.println("--- Cloud Contact Repository ---"); // Print header
        
        HashMap contacts = new HashMap<>(); // Key: Name, Value: Number
        
        // 1. ADDING PAIRS
        contacts.put("Alice", "98765-001"); // Map name Alice to her phone number
        contacts.put("Babu", "98765-002"); // Map name Babu to his number
        contacts.put("Chitra", "98765-003"); // Map name Chitra to her number
        
        // 2. UPDATING VALUES
        contacts.put("Alice", "98765-999"); // Re-mapping Alice; same key overwrites the old number
        System.out.println("Updated Phonebook: " + contacts); // Print contents
        
        // 3. RETRIEVAL (GET)
        String search = "Babu"; // Key to search for
        if (contacts.containsKey(search)) { // Check if the key exists in the map
            System.out.println("Found " + search + ": " + contacts.get(search)); // Fetch and print the value
        } // End of search check
        
        // 4. REMOVAL
        contacts.remove("Chitra"); // Remove the entry associated with key "Chitra"
        
        // 5. FULL ITERATION
        System.out.println("\nFull Contact List:"); // Section header
        for (Map.Entry entry : contacts.entrySet()) { // Iterate through the entries (pairs)
            System.out.println("Name: " + entry.getKey() + " | Phone: " + entry.getValue()); // Print both parts
        } // End of entrySet loop
        
        System.out.println("Final Count: " + contacts.size()); // Show total entries remaining
        System.out.println("Mapping Lab: Finished."); // Final log for mapping demonstration
    } // End of main method
} // End of PhonebookMap class