Roeyyyy的博客

1.题目要求：Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.The brackets must close in the correct order, "()" and "()[]{}" are all val...

1.题目要求：Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.2.题目理解：题目需求是合并两个已排序的链表，合并后链表依然有序。输入: 1->2->4  ...