Linked List Cycle

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Linked List Cycle

Given a linked list, determine if it has a cycle in it.
Follow up:
Can you solve it without using extra space?
参考代码:http://leetcode.com/2010/09/detecting-loop-in-singly-linked-list.html

bool hasCycle(ListNode *head) {//经典解法        ListNode* slow =head,*fast =head;        while(fast&&fast->next)        {            slow =slow->next;            fast =fast->next->next;            if(slow ==fast)                return true;        }        return false;    }

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Linked List Cycle

Linked List CycleGiven a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?参考代码:http://leetcode.com/2010/09/detecting-loop-in-singly-linked-list.html

bool hasCycle(ListNode *head) {//经典解法 ListNode* slow =head,*fast =head; while(fast&&fast->next) { slow =slow->next; fast =fast->next->next; if(slow ==fast) return true; } return false; }

Linked List Cycle

Given a linked list, determine if it has a cycle in it.
Follow up:
Can you solve it without using extra space?
参考代码:http://leetcode.com/2010/09/detecting-loop-in-singly-linked-list.html

bool hasCycle(ListNode head) {//经典解法 ListNode slow =head,*fast =head; while(fast&&fast->next) { slow =slow->next; fast =fast->next->next; if(slow ==fast) return true; } return false; }