2017年2月19日
E. Change-free
摘要： Student Arseny likes to plan his life for n days ahead. He visits a canteen every day and he has already decided what he will order in each of the fol 阅读全文
posted @ 2017-02-19 20:39 Heilce 阅读(516) 评论(0) 推荐(0) 编辑