07 2018 档案
摘要：This time, you are supposed to find A+B where A and B are two polynomials. Input Each input file contains one test case. Each case occupies 2 lines, a
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摘要：Calculate a + b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less t
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摘要：Given a string, you are supposed to output the length of the longest symmetric sub-string. For example, given "Is PAT&TAP symmetric?", the longest sym
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摘要：Eva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a universal shopping mall which cou
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摘要：Eva is trying to make her own color stripe out of a given one. She would like to keep only her favorite colors in her favorite order by cutting off th
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摘要：一个数组A中存有N（N>0）个整数，在不允许使用另外数组的前提下，将每个整数循环向右移M（M>=0）个位置，即将A中的数据由（A~0~ A~1~……A~N-1~）变换为（A~N-M~ …… A~N-1~ A~0~ A~1~……A~N-M-1~）（最后M个数循环移至最前面的M个位置）。如果需要考虑
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摘要：让我们定义 dn 为：dn = pn+1 - pn，其中 pi 是第i个素数。显然有 d1=1 且对于n>1有 dn 是偶数。“素数对猜想”认为“存在无穷多对相邻且差为2的素数”。 现给定任意正整数N (< 105)，请计算不超过N的满足猜想的素数对的个数。 输入格式：每个测试输入包含1个测试用例，
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摘要：卡拉兹(Callatz)猜想已经在1001中给出了描述。在这个题目里，情况稍微有些复杂。 当我们验证卡拉兹猜想的时候，为了避免重复计算，可以记录下递推过程中遇到的每一个数。例如对n=3进行验证的时候，我们需要计算3、5、8、4、2、1，则当我们对n=5、8、4、2进行验证的时候，就可以直接判定卡拉兹
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摘要：卡拉兹(Callatz)猜想： 对任何一个自然数n，如果它是偶数，那么把它砍掉一半；如果它是奇数，那么把(3n+1)砍掉一半。这样一直反复砍下去，最后一定在某一步得到n=1。卡拉兹在1950年的世界数学家大会上公布了这个猜想，传说当时耶鲁大学师生齐动员，拼命想证明这个貌似很傻很天真的命题，结果闹得学
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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
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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
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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
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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
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摘要：According to Wikipedia: Insertion sort iterates, consuming one input element each repetition, and growing a sorted output list. At each iteration, ins
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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
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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
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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
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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
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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
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摘要：Given a non-empty tree with root R, and with weight W~i~ assigned to each tree node T~i~. The weight of a path from R to L is defined to be the sum of
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摘要：A family hierarchy is usually presented by a pedigree tree. Your job is to count those family members who have no child. Input Each input file contain
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摘要：A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in moving a product from supplier to customer
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摘要：A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to find t
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摘要：A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in moving a product from supplier to customer
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