Program to detect loop in a linked list

#include <iostream>

using namespace std;

class Node 
{
public:
    int data;       // Data stored in the node
    Node* next;     // Pointer to the next node in the list
};

// Function to detect a loop in a linked list
bool detectCycle(Node* head) 
{
    Node* slow = head;
    Node* fast = head;
    
    while(fast != nullptr && fast->next != nullptr)
    {
        if(fast == nullptr)
            return false;
            
        slow = slow->next;
        fast = fast->next->next;
        
        if(slow == fast)
            return true;
    }
}

int main() 
{
    Node* head = new Node();
    Node* second = new Node();
    Node* third = new Node();
    Node* fourth = new Node();
    Node* fifth = new Node();

    head->data = 1;
    head->next = second;
    second->data = 2;
    second->next = third;
    third->data = 3;
    third->next = fourth;
    fourth->data = 4;
    fourth->next = fifth;
    fifth->data = 5;
    fifth->next = third; 
    
    if (detectCycle(head)) 
    {
        cout << "Loop detected in the linked list." << endl;
    }
    else 
    {
        cout << "No loop detected in the linked list." << endl;
    }
    
    delete head;
    delete second;
    delete third;
    delete fourth;
    delete fifth;
    
    //--------------------------New input set------------------------//
    
    /*Node* head = new Node(); 
    Node* second = new Node(); 
    Node* third = new Node(); 
    
    head->data = 1; 
    head->next = second; 
    second->data = 2; 
    second->next = third; 
    third->data = 3; 
    third->next = nullptr;
    
    if (detectCycle(head)) 
    {
        cout << "Loop detected in the linked list." << endl;
    }
    else 
    {
        cout << "No loop detected in the linked list." << endl;
    }
    
    delete head;
    delete second;
    delete third;*/
    
    //--------------------------New input set------------------------//

    /*Node* head = new Node(); 
    head->data = 1; 
    head->next = head;
    
    if (detectCycle(head)) 
    {
        cout << "Loop detected in the linked list." << endl;
    }
    else 
    {
        cout << "No loop detected in the linked list." << endl;
    }
    
    delete head;*/

    return 0;
}