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int gcd (int x, int y)//最大公约数 { return y == 0 ? x : gcd( y , x % y ); } int lcm(int x, int y)//最小公倍数 { return x*y/gcd(x,y); } 阅读全文
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Description Background Professor Hopper is researching the sexual behavior of a rare species of bugs. He assumes that they feature two different gende 阅读全文
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Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. 阅读全文