王清河

摘要： “答案正确”是自动判题系统给出的最令人欢喜的回复。本题属于PAT的“答案正确”大派送 —— 只要读入的字符串满足下列条件，系统就输出“答案正确”，否则输出“答案错误”。 得到“答案正确”的条件是： 1. 字符串中必须仅有P, A, T这三种字符，不可以包含其它字符；\ 现在就请你为PAT写一个自动裁 阅读全文

摘要： Given a sequence of K integers { N~1~, N~2~, ..., N~K~ }. A continuous subsequence is defined to be { N~i~, N~i+1~, ..., N~j~ } where 1 <= i <= j <= K 阅读全文

摘要： Indeed there are many different tourist routes from our city to Rome. You are supposed to find your clients the route with the least cost while gainin 阅读全文

摘要： A gas station has to be built at such a location that the minimum distance between the station and any of the residential housing is as far away as po 阅读全文

摘要： According to Wikipedia: Insertion sort iterates, consuming one input element each repetition, and growing a sorted output list. At each iteration, ins 阅读全文

摘要： When register on a social network, you are always asked to specify your hobbies in order to find some potential friends with the same hobbies. A "soci 阅读全文

摘要： 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 阅读全文

摘要： A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文

摘要： A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文

摘要： A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文