随笔分类 - PAT
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：Zhejiang University has 8 campuses and a lot of gates. From each gate we can collect the in/out times and the plate numbers of the cars crossing the g
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摘要：Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3×5×6×7, where 5, 6, a
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摘要：Given a singly linked list L with integer keys, you are supposed to remove the nodes with duplicated absolute values of the keys. That is, for each va
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摘要：According to Wikipedia: Insertion sort iterates, consuming one input element each repetition, and growing a sorted output list. Each iteration, insert
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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：People on Mars count their numbers with base 13: Zero on Earth is called "tret" on Mars. The numbers 1 to 12 on Earth is called "jan, feb, mar, apr, m
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摘要：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
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摘要：It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that c
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摘要：To evaluate the performance of our first year CS majored students, we consider their grades of three courses only: C - C Programming Language, M - Mat
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摘要：With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best players from the best teams doing ba
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摘要：Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is yes, if 6 is a decimal number and 110 is a
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摘要：This time, you are supposed to find A×B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occu
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摘要：Given a sequence of K integers { N1, N2, ..., NK }. A continuous subsequence is defined to be { Ni, Ni+1, ..., Nj } where 1. The Max
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摘要：At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door
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摘要：Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the sum in English. Input Specificat
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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 Specification: Each inp
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摘要：As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some ro
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摘要：This time, you are supposed to find A+B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occu
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摘要：1001 A+B Format (20分) Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unl
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