Remove loop in Linked List

class Solution
{
    public:
    //Function to remove a loop in the linked list.
    void removeLoop(Node* head)
    {
        // code here
        // just remove the loop without losing any nodes
        Node* slow=head,*fast=head;
        Node* prev=NULL;
        while(fast!=NULL && fast->next!=NULL){
            slow=slow->next;
            fast=fast->next->next;
            if(slow==fast && slow!=head) {
                slow=head;
                while(slow->next!=fast->next){
                    slow=slow->next;
                    fast=fast->next;
                }
                fast->next=NULL;
                break;
            }else if(slow==fast){
                Node* temp=head;
                while(temp->next!=head) temp=temp->next;
                temp->next=NULL;
            }
        }
        
    }
};