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摘要： 描述In the game of Dungeons & Dragons, players often roll multi-sided dice to generate random numbers which determine the outcome of actions in the game. These dice come in various flavors and shapes, ranging from a 4-sided tetrahedron to a 20-sided isocahedron. The faces of an n-sided die, called 阅读全文

摘要： 描述Alex likes solving problems on WOJ (http://acm.whu.edu.cn/oak). As we all know, a beautiful balloon will appears when a problem is solved. Alex love... 阅读全文