摘要: You are given a permutation a1,a2,…,ana1,a2,…,an of integers from 00 to n−1n−1. Your task is to find how many permutations b1,b2,…,bnb1,b2,…,bn are si 阅读全文
posted @ 2022-07-05 10:25 cbmango 阅读(132) 评论(0) 推荐(0)