2016 年 5月 21 日随笔档案 - cnxo

2016年5月21日

摘要： Problem Description There are many students in PHT School. One day, the headmaster whose name is PigHeader wanted all students stand in a lin... 阅读全文

posted @ 2016-05-21 21:38 cnxo 阅读(123) 评论(0) 推荐(0) 编辑

HDOJ/HDU 1250 Hat's Fibonacci(大数~斐波拉契)

摘要： Problem Description A Fibonacci sequence is calculated by adding the previous two members the sequence, with the first two members being both... 阅读全文

posted @ 2016-05-21 20:22 cnxo 阅读(123) 评论(0) 推荐(0) 编辑

HDOJ/HDU 1133 Buy the Ticket(数论~卡特兰数~大数~)

摘要： Problem Description The “Harry Potter and the Goblet of Fire” will be on show in the next few days. As a crazy fan of Harry Potter, you will ... 阅读全文

posted @ 2016-05-21 19:03 cnxo 阅读(103) 评论(0) 推荐(0) 编辑

卡特兰数(Catalan Number) 算法、数论组合~

摘要： Catalan number，卡特兰数又称卡塔兰数，是组合数学中一个常出现在各种计数问题中出现的数列。以比利时的数学家欧仁·查理·卡塔兰 (1814–1894)命名。卡特兰数的前几个数前20项为（OEIS中的数列A000108）：1, 1, 2, 5, 14, 42, 132, ... 阅读全文

posted @ 2016-05-21 17:49 cnxo 阅读(229) 评论(0) 推荐(0) 编辑