题解 | #链表中环的入口结点#
链表中环的入口结点
https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4
package main
func EntryNodeOfLoop(pHead *ListNode) *ListNode {
reverseHead := &ListNode{}
for pHead != nil {
if pHead.Next == nil {
return nil
}
// 判断自环
if pHead.Next == pHead {
return pHead
}
// 判断环
if pHead.Next.Next == reverseHead {
return pHead.Next
}
temp := pHead.Next
pHead.Next = reverseHead
pHead = temp
}
return nil
}
投递字节跳动等公司8个岗位
