摘要：
Lucy likes letters. She studied the definition of the lexicographical order at school and plays with it. At first, she tried to construct the lexicogr 阅读全文
摘要：
Byteburg Senate elections are coming. Usually "United Byteland", the ruling Byteland party, takes all the seats in the Senate to ensure stability and 阅读全文
摘要：
Balph is learning to play a game called Buma. In this game, he is given a row of colored balls. He has to choose the color of one new ball and the pla 阅读全文