题解 | #删除链表峰值#
删除链表峰值
https://www.nowcoder.com/practice/30a06e4e4aa549198d85deef1bab6d25
/** * 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 */ #include<stdlib.h> #include<stdio.h> struct ListNode* deleteNodes(struct ListNode* head ) { // write code here if (NULL==head || NULL==head->next) { return head; } struct ListNode* pre = head; //初始化 struct ListNode* node = pre->next; while (node->next) { if (pre->val < node->val && node->val > node->next->val) //判断中间的数与头尾两个数的大小关系 { pre->next = node->next; //需要删除,则直接跳过这个节点 node = node->next; } else//否则正常遍历 { pre = node; node = pre->next; } } return head; }