vir_lee的博客

给定一个常数K以及一个单链表L，请编写程序将L中每K个结点反转。例如：给定L为1→2→3→4→5→6，K为3，则输出应该为3→2→1→6→5→4；如果K为4，则输出应该为4→3→2→1→5→6，即最后不到K个元素不反转。 输入格式： 每个输入包含1个测试用例。每个测试用例第1行给出第1个结点的地址、结点总个数正整数N(<= 10^5^)、以及正整数K(<=N)，即要求反转的子链结点...

Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The rules for the customers to wait in line are: The space...

Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to output the level order traversal sequence of the cor...

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of b...

Given a stack which can keep M numbers at most. Push N numbers in the order of 1, 2, 3, ..., N and pop randomly. You are supposed to tell if a given sequence of numbers is a possible pop sequence of t...

An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that when a 6-node binary tree (with the keys numbered from 1 to 6) is traversed, the stac...

An AVL tree is a self-balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any time they differ by more than one, rebalancing is...