14. Longest Common Prefix
Write a function to find the longest common prefix string amongst an array of strings.
注:这题竟然连个示例都没有,说明特殊情况并不多,就是要找出所有字符串的最长公共前缀。他应该不会超过所有字符串中最短的那个,可以试着找出最短长度n,然后每个都读取和比较n个,并根据情况不断减小那个n.
19. Remove Nth Node From End of List
Given a linked list, remove the nth node from the end of list and return its head.
For example,
Given linked list: 1->2->3->4->5, and n = 2.
After removing the second node from the end, the linked list becomes 1->2->3->5.
Note:
Given n will always be valid.
Try to do this in one pass.
注:给出一个链表,把倒数第n个元素移除。听起来很常用的技术,了解一下链表的结构,用处 ,优势,再来做这个题。
时间: 2024-12-24 21:45:31