Test case 2 is not passing please suggest changes

#1

Node* detectCycle(Node* head)
{

Node* fast=head, * slow=head;


while(fast->next!=NULL)
{

    fast=fast->next->next;
    slow=slow->next;

    if(fast==slow)
    {
        return fast;
    }



}
return NULL;

}

bool floydCycleRemoval(Node *head)

{
/* Code here */

if(head==NULL|| head->next==NULL)
{
    return false;
}

Node* intersection=detectCycle(head);

if(
    intersection!=NULL
)
{
Node * slow=head;

while(slow!=intersection)
{
    slow=slow->next;
    intersection=intersection->next;

}

while(slow->next!=intersection)
{
    slow=slow->next;
}
slow->next=NULL;

return true;

}
else{
    return false;
}

}

#2 
bool floydCycleRemoval(Node *head)
{
    /* Code here */
    if(head == NULL || head->next == NULL){
            return false;
        }
        if(head->next == head){
            head->next = NULL;
            return true;
        }
        
        Node* slow = head;
        Node* fast = head;
        bool foundcycle = false;
        while(fast!=NULL && fast->next!=NULL){
            slow = slow->next;
            fast = fast->next->next;
            if(slow == fast){
                foundcycle = true;
                break;
            }
        }

        if(foundcycle==false){
            return false;
        }
        
        if(foundcycle == true){
            if(fast == head){
                Node* temp = head;
                while(temp->next != head){
                    temp = temp->next;
                }
                temp->next = NULL;
            }
            else{
                Node* temp = head;
                while(slow->next != temp->next){
                    temp = temp->next;
                    slow = slow->next;
                }
                slow->next = NULL;
            }
        }
        return true;
}
#3

whats wrong in my code please tell me that

#4

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