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Problem DescriptionYou live in a village but work in another village. You decided to follow the straight path between your house (A) and the working p... 阅读全文
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Problem DescriptionAkemi Homura is a Mahou Shoujo (Puella Magi/Magical Girl).Homura wants to help her friend Madoka save the world. But because of the... 阅读全文
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Problem DescriptionSakura has a very magical tool to paint walls. One day, kAc asked Sakura to paint a wall that looks like an M×N matrix. The wall ha... 阅读全文
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Problem DescriptionIn your childhood, do you crazy for collecting the beautiful cards in the snacks? They said that, for example, if you collect all t... 阅读全文
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Problem DescriptionHzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each step he t... 阅读全文