2017年10月24日
Codeforces Round #442 (Div. 2)
摘要： A. Alex and broken contest One day Alex was creating a contest about his friends, but accidentally deleted it. Fortunately, all the problems were save 阅读全文
posted @ 2017-10-24 16:56 天之道，利而不害 阅读(212) 评论(0) 推荐(0) 编辑