update leetcode

xiaobinqt · Sep 5, 2023 · ba7d321 · ba7d321
1 parent 7c9ea06
commit ba7d321
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/book.leetcode/docs/medium/142.md b/book.leetcode/docs/medium/142.md
@@ -43,7 +43,7 @@ func detectCycle(head *ListNode) *ListNode {
 	// 因为快指针走 2 步，不要判断 next 是否为 nil
 	for fast != nil && fast.Next != nil {
 		low = low.Next
-		fast = fast.Next.Next
+		fast = fast.Next.Next // 注意这里 fast 是走 2 步
 		if fast == low {
 			for low != head {
 				low = low.Next