2018年3月19日
Old Berland Language
摘要： Old Berland Language Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Ev 阅读全文
posted @ 2018-03-19 17:21 风干中的咸鱼 阅读(164) 评论(0) 推荐(0) 编辑