摘要: Travel The country frog lives in has nn towns which are conveniently numbered by 1,2,…,n1,2,…,n. Among n(n−1)2n(n−1)2 pairs of towns, mm of them are c 阅读全文
posted @ 2017-08-18 21:58 happy_codes 阅读(343) 评论(0) 推荐(0) 编辑