C. GCD Table time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The GCD table G of size n × n for an array of positive integers a of length n is defined by formula Let us remind you that the greatest common divisor (GCD) of two positive integers x and y is the …

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也许今年不该参赛的.... 因为暑假才刚刚调整好心态... 上学期基本废掉了... 感觉就是虚得不行，什么都不会的感觉.... ．．． 倒是每天做题都能把自己搞得excited 大概越是弱的人越容易exicted吧．

D. Three Logos time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Three companies decided to order a billboard with pictures of their logos. A billboard is a big square board. A logo of each company is a rectangle of a non-zero area. Advertisers will put up the …