摘要: 看了一天卡特兰数...我要自闭了QAQ (如果不写一篇明天就会全部忘记QuQ (要不感觉对不起看了一天别人的题解qwqqqq Codeforces 15E. Triangles Last summer Peter was at his granny's in the country, when a 阅读全文
posted @ 2019-02-10 20:10 Grigory 阅读(341) 评论(0) 推荐(0) 编辑