21 lines
402 B
Java
21 lines
402 B
Java
/**
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* Definition for singly-linked list. class ListNode { int val; ListNode next; ListNode(int x) { val
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* = x; next = null; } }
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*/
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public class Solution {
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public boolean hasCycle(ListNode head) {
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var x = head;
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var y = head;
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while (y != null && y.next != null) {
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x = x.next;
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y = y.next.next;
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if (x == y) {
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return true;
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}
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}
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return false;
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}
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}
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