题解 | #删除链表峰值#

package main

// import "fmt"
import . "nc_tools"

/*
 * type ListNode struct{
 *   Val int
 *   Next *ListNode
 * }
 */

/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 *
 * @param head ListNode类
 * @return ListNode类
 */
func deleteNodes(head *ListNode) *ListNode {
	// write code here
	pre := head
	cur := head.Next
	for cur.Next != nil {
		if cur.Val > cur.Next.Val && cur.Val > pre.Val {
			delete(head, cur.Val)
		}
		pre = cur
		cur = cur.Next
	}
	return head
}

func delete(head *ListNode, target int) {
	tmp := head
	pre := &ListNode{Next: tmp}
	for tmp != nil {
		if tmp.Val == target {
			if tmp.Next == nil {
				tmp = nil
				break
			}
			pre.Next = tmp.Next
			tmp = nil
			break
		}
		pre = pre.Next
		tmp = tmp.Next
	}
}