GFG PTOD | 26 Jan | Remove loop in Linked List

void removeLoop(Node* head) {
        // code here
        Node* slow = head, *fast = head;
        while(fast && fast->next) {
            slow = slow->next;
            fast = fast->next->next;
            if(slow == fast) {
                slow = head;
                // check if fast and slow pointer at head node
                if(fast == slow) {
                    while(fast->next != slow)
                        fast = fast->next;
                }
                else {
                   while(slow->next !=fast->next) {
                        slow = slow->next;
                        fast = fast->next;
                    } 
                }
                
                fast->next = NULL;
            }
        }
    }