题解 | #删除链表峰值#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 */
/**
 * 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
 */
struct ListNode* deleteNodes(struct ListNode* head ) {
    // write code here
    if(!head)
    {
        return NULL;
    }
    if(head -> next == NULL)
    {
        return NULL;
    }
    struct ListNode * px = head->next;
    struct ListNode * pf = head;
    while(px ->next)
    {
        if(pf ->val < px -> val && px ->val > px->next->val)
        {
            pf ->next = px -> next;
            px  = px ->next;
        }
        else
        {
            pf = px;
            px = px ->next;
        }
    }
    return head;
}