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lucas啥的定理，把M,N分解为P进制来做In Reply To:C(N,M)%P,M<=N<=10^9,P为素数，该怎么做啊。。。。路过的帮忙看下哈。。。 Posted by:aclover at 2009-11-03 15:53:52 N分解完是(N[k],N[k-1]...N[0]) M分解完是(M[k],M[k-1]...M[0]) 然后计算c(N[i],M[i])的积,前提是P不大,百万级别，至于子问题就暴力分解素因子就可以了 Followed by:
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