2020年4月13日
Codeforces Round #633 (Div. 2)
摘要： You have integer nn. Calculate how many ways are there to fully cover belt-like area of 4n−24n−2 triangles with diamond shapes. Diamond shape consists 阅读全文
posted @ 2020-04-13 17:18 Swelsh-corgi 阅读(290) 评论(1) 推荐(1) 编辑