摘要：
Description 现有一颗含$N$个珠子的项链，每个珠子有$t$种不同的染色。现求在旋转置换下有多少种本质不同的项链，在旋转和翻转置换下有多少种本质不同的项链。$N The input file contains several lines of input. Each line contai 阅读全文
摘要：
Description Alan loves to construct the towers of building bricks. His towers consist of many cuboids with square base. All cuboids have the same heig 阅读全文