摘要:
ROADSTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 11265Accepted: 4172DescriptionN cities named with numbers 1 ... N are connected with one... 阅读全文
摘要:
数论Lucas定理是用来求 c(n,m) mod p的值,p是素数(从n取m组合,模上p)。描述为:Lucas(n,m,p)=cm(n%p,m%p)* Lucas(n/p,m/p,p)Lucas(x,0,p)=1;而cm(a,b)=a! * (b!*(a-b)!)^(p-2) mod p也= (a!... 阅读全文