摘要：
DescriptionFedya studies in a gymnasium. Fedya's maths hometask is to calculate the following expression:(1n + 2n + 3n + 4n)mod5for given value ofn. F... 阅读全文
摘要：
In Africa there is a very special species of bee. Every year, the female bees of such species give birthto one male bee, while the male bees give birt... 阅读全文