2017年8月3日
Olympiad
摘要： 2017-08-03 20:33:21 You are one of the competitors of the Olympiad in numbers. The problem of this year relates to beatiful numbers. One integer is ca 阅读全文
posted @ 2017-08-03 20:26 Hunter丶安 阅读(216) 评论(0) 推荐(0)
找新朋友
摘要： 2017-08-03 https://baike.baidu.com/item/%E6%AC%A7%E6%8B%89%E5%87%BD%E6%95%B0?fr=aladdin https://baike.baidu.com/item/%E6%AC%A7%E6%8B%89%E5%87%BD%E6%95 阅读全文
posted @ 2017-08-03 18:02 Hunter丶安 阅读(181) 评论(0) 推荐(0)
卡特兰数
摘要： 卡塔兰数是组合数学中一个常在各种计数问题中出现的数列。仍存有疑惑，之后再解释； As we all know the Train Problem I, the boss of the Ignatius Train Station want to know if all the trains come 阅读全文
posted @ 2017-08-03 10:43 Hunter丶安 阅读(125) 评论(0) 推荐(0)