回复 @铁策 :
原来是April Fools Day 。

回复 @stdafx.h :
嘿嘿嘿……这题在比赛的时候只有不到400个人写出来（总人数4000多），怎么是水题呢（滑稽）
官方题解
This problem asked to figure out an integer sequence from two samples and problem title. It turned out to be surprisingly hard, a lot harder than I anticipated. A quick search through OEIS shows that while there are a lot of sequences which have these two numbers in them, only one is related to Leonardo da Vinci (and if you're looking for da Vinci, there are only two sequences overall). http://oeis.org/A221180 is an erroneous series of powers of 2, written down by da Vinci in his diaries and available as part of "Codex Madrid I".

回复 @/k :
注意标题

数据是错的，只能打表。

.....举报！

这算法实现起来很痛苦！

回复 @OhYee :
你需要快读函数

lis

lcis

lcis

卡时间的都不是什么好人= =。

这题真是几个数列操作题的变态强化版！思路简单，数据却奇强无比！
谁能告诉我怎么还能更快？

回复 @stdafx.h :
学长好 过几天就见面了

Orz

保存代码，未优化的二维

不错呦

.

未优化，，，

6楼

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