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
    struct ListNode *pPrev, *pNext;
    struct ListNode *p = head;


    if(p->next) {
        pPrev = p;
        p = p->next;
        pNext = p->next;
    }

    while(pNext) {
        if(p->val > pPrev->val && p->val > pNext->val) {
            pPrev->next = pNext;            
        }
        else {
            pPrev = p;
        }

        p = pNext;
        pNext = pNext->next;
    }

    return head;
}