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DescriptionA prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", "ca",... 阅读全文
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Problem DescriptionJohn is a manager of a CPU chip factory, the factory produces lots of chips everyday. To manage large amounts of pr... 阅读全文
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Problem DescriptionA hat’s word is a word in the dictionary that is the concatenation of exactly two other words in the dictionary.You... 阅读全文
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Problem DescriptionGiven a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. ... 阅读全文
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Genos recently installed the game Zuma on his phone. In Zuma there exists a line of n gemstones, the i-th of which has color ci. The g... 阅读全文