Linked_List_Cycle_aniketrochwani.cpp

bool hasCycle(ListNode *head) {
    if(head == NULL) return false;
        
    ListNode* fast = head;
    ListNode* slow = head;
        
    while(fast->next != NULL and fast->next->next != NULL){
            fast = fast->next->next;
            slow = slow->next;
            
            if(fast == slow){
                return true;
            }
    }   
    return false;
}