题解 | #判断链表中是否有环#
判断链表中是否有环
https://www.nowcoder.com/practice/650474f313294468a4ded3ce0f7898b9
package main
import . "nc_tools"
/*
* type ListNode struct{
* Val int
* Next *ListNode
* }
*/
func hasCycle(head *ListNode) bool {
p := head
q := head
for p != nil && q != nil {
p = p.Next
q = q.Next
if q != nil {
q = q.Next
}
if q != nil && p == q {
return true
}
}
return false
// write code here
}
