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Description 小Ho未来有一个为期N天的假期，他计划在假期中看A部电影，刷B道编程题。为了劳逸结合，他决定先拿出若干天看电影，再拿出若干天刷题，最后再留若干天看电影。(若干代指大于0) 每天要么看电影不刷题，要么刷题不看电影；不会既刷题又看电影。并且每天至少看一部电影，或者刷一道题。现在小 阅读全文
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Description The greatest common divisor GCD(a,b) of two positive integers a and b,sometimes written (a,b),is the largest divisor common to a and b,For 阅读全文
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Description Given a positive integer N, your task is to calculate the sum of the positive integers less than N which are not coprime to N. A is said t 阅读全文
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