递归终止条件: F(1) = 0, F(2) = 1. 具体的推导可以看这里.英文: Derangement Permutation Implementation using R Programming
XXX原文:: https://justyy.com/archives/3457
递归终止条件: F(1) = 0, F(2) = 1. 具体的推导可以看这里.英文: Derangement Permutation Implementation using R Programming
XXX原文:: https://justyy.com/archives/3457