class Solution { public: bool hasCycle(ListNode *head) { ListNode* slow=head; ListNode* fast=head; while(fast!=NULL&&fast->next!=NULL){ slow=slow->next; fast=fast->next->next; if(slow==fast){ return true; } } return false; } };
class Solution { public: bool hasCycle(ListNode *head) { ListNode* slow=head; ListNode* fast=head; while(fast!=NULL&&fast->next!=NULL){ slow=slow->next; fast=fast->next->next; if(slow==fast){ return true; } } return false; } };
