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POJ3126 Prime PathThe ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices. — It is a matter of security to change such things every

Problem DescriptionThis is a small but ancient game. You are supposed to write down the numbers 1, 2, 3, ... , 2n - 1, 2n consecutively in clockwise order on the ground to form a circle, and then,

Lucas定理及其扩展求C(m, n) % p) (p为素数)表达式：C(n,m)%p=C(n/p,m/p)*C(n%p,m%p)%p当p<1e6时

开关问题Time Limit: 1000MSMemory Limit: 30000KTotal Submissions: 8188Accepted: 3239Description有N个相同的开关，每个开关都与某些开关有着联系，每当你打开或者关闭某个开关的时候，其他的与此开关相关联的开关也会相应地发生变化，即这些相

xtu 1260 Determinant [2017年中国大学生程序设计竞赛全国邀请赛(湖南) A]高斯消元求伴随矩阵

uva1635 Irrelevant Elements; 唯一分解定理; 组合数;Young cryptoanalyst Georgie is investigating different schemes of generating random integer numbersranging from 0 to m − 1. He thinks that standard random number generators are not good enough, sohe has invented