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by genshinimpactplayer @ 2020-03-26 12:09:36
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by Surelysuper @ 2020-03-26 12:11:58
有点意思
by Inkyo @ 2020-03-26 12:16:19
打表找规律吧
by WYXkk @ 2020-03-26 12:21:03
@[SSerxhs](/user/29826) ~~orz,那我废了~~
by 离散小波变换° @ 2020-03-26 12:21:41
易证可以贪心
易证 ${b_{i+1}-b_i}$ 会越来越大
考虑枚举这个差值(差值之间的差可能大于1,可以考虑跳跃转移),复杂度大约是根号级,不会证
by SSerxhs @ 2020-03-26 12:22:48
[简单地打了一个表](https://www.luogu.com.cn/paste/5zoq2kk9)。
然而我太菜了,看不出规律(
by 离散小波变换° @ 2020-03-26 12:26:22
~~在各位dalao得出答案前,我还是乖乖地O(n)吧,我太蒻了qwq~~
by Dancing_Wave @ 2020-03-26 12:26:52
@[xiaduowen](/user/147595) 我觉得这个可能有用:
<https://oeis.org/A002491>
好像结果和我打的表一样。
by 离散小波变换° @ 2020-03-26 12:28:15
@[离散小波变换°](/user/68344) 要严格单调递增哦
by Dancing_Wave @ 2020-03-26 12:28:29