摘要: Bob's school has a big playground, boys and girls always play games here after school. To protect boys and girls from getting hurt whe... 阅读全文
posted @ 2019-04-10 22:24 black_hole6 阅读(210) 评论(0) 推荐(0)
摘要: 原博客:https://blog.csdn.net/wookaikaiko/article/details/81105031一、关于卡特兰数 卡特兰数是一种经典的组合数,经常出现在各种计算中,其前几项为 : 1, 2, 5, 14, 42, 132, 42... 阅读全文
posted @ 2019-04-10 18:54 black_hole6 阅读(809) 评论(0) 推荐(0)