Codeforces Round #277 (Div. 2)
摘要：
整理上次写的题目：A:For a positive integernlet's define a functionf:f(n) = - 1 + 2 - 3 + .. + ( - 1)nnYour task is to calculatef(n)for a given integern.InputT... 阅读全文
posted @ 2014-11-13 21:08 forgot93 阅读(136) 评论(0) 推荐(0) 编辑
