FilesExpand file tree

 master

/

141_hasCycle.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

26 lines (26 loc) · 609 Bytes

 master

/

141_hasCycle.java

Copy path

Top

File metadata and controls

• Code
• Blame

26 lines (26 loc) · 609 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

/**

* Definition for singly-linked list.

* class ListNode {

* int val;

* ListNode next;

* ListNode(int x) {

* val = x;

* next = null;

* }

* }

*/

public class Solution {

public boolean hasCycle(ListNode head) {

if(head == null || head.next == null) return false;

ListNode slow = head;

ListNode fast = head;

while(fast.next!=null && fast.next.next!=null){

fast = fast.next.next;

slow = slow.next;

if(slow == fast){

return true;

}

}

return false;

}

}