摘要:
Matt is playing a naive computer game with his deeply loved pure girl. The playground is a rectangle with walls around. Two balls are put in different 阅读全文
摘要:
Description In mathematics, the four color theorem, or the four color map theorem, states that, given any separation of a plane into contiguous region 阅读全文
摘要:
Description There is a curious man called Matt. One day, Matt's best friend Ted is wandering on the non-negative half of the number line. Matt finds i 阅读全文