2020年7月22日
Key Set 快速幂
摘要： 题目： soda has a set S with n integers {1,2,…,n}. A set is called key set if the sum of integers in the set is an even number. He wants to know how many 阅读全文
posted @ 2020-07-22 20:54 Rain_luo 阅读(63) 评论(0) 推荐(0) 编辑