随笔分类 - PAT
摘要：Given a set of N (>) positive integers, you are supposed to partition them into two disjoint sets A1 and A2 of n1 and n2 numbers, respecti
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摘要：Recommendation system predicts the preference that a user would give to an item. Now you are asked to program a very simple recommendation system that
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摘要：British astronomer Eddington liked to ride a bike. It is said that in order to show off his skill, he has even defined an "Eddington number", E -- tha
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摘要：Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Each test is supposed to run sim
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摘要：About 900 years ago, a Chinese philosopher Sima Guang wrote a history book in which he talked about people's talent and virtue. According to his theor
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摘要：Given a list of N student records with name, ID and grade. You are supposed to sort the records with respect to the grade in non-increasing order, and
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摘要：When shipping goods with containers, we have to be careful not to pack some incompatible goods into the same container, or we might get ourselves in s
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摘要："Damn Single (单身狗)" is the Chinese nickname for someone who is being single. You are supposed to find those who are alone in a big party, so they can
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摘要：Two integers are called "friend numbers" if they share the same sum of their digits, and the sum is their "friend ID". For example, 123 and 51 are fri
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摘要：On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc
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摘要：Eva would like to make a string of beads with her favorite colors so she went to a small shop to buy some beads. There were many colorful strings of b
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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：People often have a preference among synonyms of the same word. For example, some may prefer "the police", while others may prefer "the cops". Analyzi
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摘要：Given two sets of integers, the similarity of the sets is defined to be /, where Nc is the number of distinct common numbers shared by the two sets
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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 socia
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摘要：Some scientists took pictures of thousands of birds in a forest. Assume that all the birds appear in the same picture belong to the same tree. You are
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摘要：One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is re
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摘要：A vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex of the set. Now given a graph with
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摘要：Input our current position and a destination, an online map can recommend several paths. Now your job is to recommend two paths to your user: one is t
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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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