努力

Description 　　DRD loves playing computer games, especially Tower Defense games. Tower Defense is a famous computer game with a number of variations. In general, you are to build some defense towers

Beads of N colors are connected together into a circular necklace of N beads (N<=1000000000). Your job is to calculate how many different kinds of the necklace can be produced. You should know that th

组合数学中比较困难的波利亚定理应用最大的障碍是不理解所要解决的立体形状的具体信息。下文详细列举了所有常见的形状和其详尽的信息。     正四面体：阶12，顶点4个，面4个，棱6条，均为等边三角形 转动群 顶点 面 棱 个数 不动 (1)4 (1)4 (1)6 1 顶点-面心 ±120度 (1)(3) (1)(3) (3)2 8