题解 | #反转链表#

package main
import . "nc_tools"
/*
 * type ListNode struct{
 *   Val int
 *   Next *ListNode
 * }
 */

/**
 * 
 * @param pHead ListNode类 
 * @return ListNode类
*/
func ReverseList( head *ListNode ) *ListNode {
    // write code here
    if head ==nil||head.Next==nil{
        return head
    }
    tail :=ReverseList(head.Next)
     head.Next.Next =head
    head.Next = nil
    return tail
}