相关链接
题目传送门:http://www.lydsy.com/JudgeOnline/problem.php?id=4259
神犇题解:http://blog.csdn.net/u011542204/article/details/50708834
解题报告
考虑之前的那个DNA的匹配问题
这题似乎也可以做,只是复杂度会乘上一个26
于是考虑优化:
将简单的0/1的多项式变成这个东西: $\sum\limits_{i = 1}^n {{{({a_i} – {b_i})}^2} \cdot {a_i} \cdot {b_i}} $
或者你要展开成这个样子也可以: $\sum {a_i^2[{b_i} \ne 0] – 2\sum {{a_i}{b_i} + \sum {b_i^2[{a_i} \ne 0]} } } $
于是我们发现搞个几次FFT什么的就可以辣!
另外这题在BZOJ上还有双倍经验:http://www.lydsy.com/JudgeOnline/problem.php?id=4503
464033 628498You produced some decent points there. I looked online to the concern and discovered many people is going in addition to using your website. 615146
944095 756226Immigration Lawyers […]the time to read or pay a visit to the content material or web sites we have linked to below the[…] 136213
747619 892676hello i discovered your post and thought it was quite informational likewise i suggest this site about repairing lap tops Click Here 57090
980926 190722Hi there! Someone in my Myspace group shared this site with us so I came to give it a look. Im surely loving the info. Im bookmarking and will be tweeting this to my followers! Outstanding weblog and amazing style and style. 127911
324627 66694The electronic cigarette uses a battery and a small heating component the vaporize the e-liquid. This vapor can then be inhaled and exhaled 184780
943384 539901I typically cant discover it in me to care enough to leaves a comment for articles on the internet but this was really pretty good, thanks and maintain it up, Ill check back once again 723501
500164 513269So, is this just for males, just for females, or is it for both sexes If it s not, then do girls need to do anything different to put on muscle 262759
246422 70732Hey there! Fantastic post! Please do tell us when we shall see a follow up! 357804
939268 78717woah i like yur internet site. It truly helped me with the info i wus seeking for. Appcriciate it, will bookmark. 815664
173237 5283cleaning supplies should have earth friendly organic ingredients so that they do not harm the environment 103293
664726 233952Id ought to talk to you here. Which is not some thing Which i do! I like reading an article that can make people believe. Also, thank you for permitting me to comment! 22302
60438 197738Its superb as your other articles : D, regards for posting . 753274
I like this website so much, bookmarked.
Hey there, You’ve performed a fantastic job. I’ll definitely digg it and in my view suggest to my friends. I’m sure they’ll be benefited from this site.