Yandex.Algorithm 2017, third elimination round: editorial (with challenges, bells and whistles)

Revision en2, by Endagorion, 2017-06-04 11:50:31

Problem A. Shifts

Topics: dynamic programming.

Suppose that we are allowed to make left circular shifts as well as right ones.

Can you solve the problem in this case?
What is the difference when we have only right shifts?
Challenge (hard/research):

History

 
 
 
 
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  Rev. Lang. By When Δ Comment
ru1 Russian Endagorion 2017-06-06 16:14:50 23910 Первая редакция перевода на Русский
en10 English Endagorion 2017-06-04 17:07:12 26 (published)
en9 English Endagorion 2017-06-04 17:05:38 33
en8 English Endagorion 2017-06-04 17:04:45 10870 Tiny change: 'ler>\n\n\n</spoiler>\n\n#### P' -> 'ler>\n\n\n#### P'
en7 English Endagorion 2017-06-04 16:18:23 5367 Tiny change: 'iler>\n\n<spoil' -> 'iler>\n\n</spoiler>\n\n\n<spoil'
en6 English Endagorion 2017-06-04 13:51:43 1634 Tiny change: '>\n$O(n^2 log n)$ ti' -> '>\n$O(n^2 \log n)$ ti'
en5 English Endagorion 2017-06-04 13:15:00 22 Tiny change: '0^9 + 7$) numbers that cons' -> '0^9 + 7$) positive numbers are there that cons'
en4 English Endagorion 2017-06-04 13:14:11 506
en3 English Endagorion 2017-06-04 13:08:22 2456 Tiny change: '### Proble' -> '#### Proble'
en2 English Endagorion 2017-06-04 11:50:31 6467 Tiny change: 'r, to any $X$ we can pr' -> 'r, to any X we can pr'
en1 English Endagorion 2017-06-04 10:31:12 960 Initial revision (saved to drafts)