2018年7月10日
Codeforces Round #496 (Div. 3) ABCDE
摘要： A. Tanya and Stairways A. Tanya and Stairways Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, 阅读全文
posted @ 2018-07-10 18:54 starry_sky 阅读(611) 评论(0) 推荐(0) 编辑