摘要：
Problem DescriptionEveryone knows Matt enjoys playing games very much. Now, he is playing such a game. There are N rooms, each with one door. There ar... 阅读全文
摘要：
DescriptionOnce upon a time Matt went to a small town. The town was so small and narrow that he can regard the town as a pivot. There were some skyscr... 阅读全文