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(208) 评论(0) 推荐(0) 编辑
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(173) 评论(0) 推荐(0) 编辑
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(121) 评论(0) 推荐(0) 编辑