-
Notifications
You must be signed in to change notification settings - Fork 59
/
Solution.java
36 lines (33 loc) · 942 Bytes
/
Solution.java
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
27
28
29
30
31
32
33
34
35
36
package g0101_0200.s0141_linked_list_cycle;
// #Easy #Top_100_Liked_Questions #Top_Interview_Questions #Hash_Table #Two_Pointers #Linked_List
// #Data_Structure_I_Day_7_Linked_List #Udemy_Linked_List #Big_O_Time_O(N)_Space_O(1)
// #2022_06_24_Time_0_ms_(100.00%)_Space_45.5_MB_(68.52%)
import com_github_leetcode.ListNode;
/*
* 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) {
return false;
}
ListNode fast = head.next;
ListNode slow = head;
while (fast != null && fast.next != null) {
if (fast == slow) {
return true;
}
fast = fast.next.next;
slow = slow.next;
}
return false;
}
}