Fix 142

2022-10-06 03:12:43 +03:00
parent cb2f99c3a8
commit c388b14c3f
1 changed files with 2 additions and 0 deletions
--- a/II/Solution.cs
+++ b/II/Solution.cs
@@ -4,6 +4,8 @@ public class Solution
 {
    public ListNode? DetectCycle(ListNode head)
    {
+        if(head == null)
+            return null;
        ListNode? cur = head;
        int bit = 1 << 28;
        int curAbs = 0;