摘要：Description There are some water, milk and wine in your kitchen. Your naughty little sister made some strange drinks by mixing them together, and then 阅读全文

摘要：Description 这是一道模板题。 本题中你需要求解一个标准型线性规划： 有$n$个实数变量$x_1,x_2,\cdots,x_n$和$m$条约束，其中第$i$条约束形如$\sum_{j=1}^{n}a_{ij}x_{j} \le b_{i}$。 此外这$n$个变量需要满足非负性限制，即$x_ 阅读全文

摘要：Description You have been struck with inspiration, and are designing a beautiful new art sculpture for the foyer of your local museum. For highly impo 阅读全文

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

摘要：Description Coupons in cereal boxes are numbered $1$ to $n$, and a set of one of each is required for a prize (a cereal box, of course). With one coup 阅读全文

摘要：Description Once upon a time Petya and Gena gathered after another programming competition and decided to play some game. As they consider most modern 阅读全文