Educational Codeforces Round 17

Revision en7, by HellKitsune, 2017-01-26 23:18:54

Hi!

After a long break, on Jan 25, 17:35 MSK will be held Educational Codeforces Round 17.

You will be given 6 tasks and 2 hours to solve them. The problemset, in my opinion, turned out to be well balanced and should be interesting for both novices and experienced participants. Task F may end up beneficial for many reds :)

The ideas for problems are by MikeMirzayanov and me. Thanks to fcspartakm for helping in preparation of this round.

I hope you will enjoy the problems and good luck!

UPD: The contest is over. Probably a little bit on the hard side for the beginners? Sorry! Editorial will be in the form of hints and will appear shortly.

UPD2: Editorial

UPD3: Challenge phase is over! Congratulations to winners:

  1. eddy1021
  2. W4yneb0t
  3. kmjp
  4. LHiC
  5. Narenji58

Also, top hackers!

  1. halyavin +249 : -35
  2. step_by_step +82 : -11
  3. -Morass- +51 : -141
  4. MishaPrigara +50 : -5
  5. uwi +46 : -9

If you want to share your ideas about tasks for next Educational Rounds, you can use the new problem proposal form. Please, use prefix "er-" in the name of the task so that we know that it is for Educational Rounds.

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
ru6 Russian HellKitsune 2017-01-26 23:24:45 742
en7 English HellKitsune 2017-01-26 23:18:54 714 Tiny change: 'halyavin] +249 : -3' -> 'halyavin] \t +249 : -3'
ru5 Russian HellKitsune 2017-01-25 20:25:28 62
en6 English HellKitsune 2017-01-25 20:24:48 1 Tiny change: 'n**UPD2:**[Editorial' -> 'n**UPD2:** [Editorial'
en5 English HellKitsune 2017-01-25 20:24:06 64 Tiny change: 'r shortly.' -> 'r shortly.\n\n[Editorial](http://codeforces.com/blog/entry/50010)'
ru4 Russian HellKitsune 2017-01-25 19:40:00 151
en4 English HellKitsune 2017-01-25 19:37:58 162
en3 English HellKitsune 2017-01-25 00:18:44 53
ru3 Russian HellKitsune 2017-01-25 00:18:08 40
ru2 Russian HellKitsune 2017-01-24 23:40:33 87
en2 English HellKitsune 2017-01-24 23:39:37 87
en1 English HellKitsune 2017-01-24 23:31:57 641 Initial revision for English translation
ru1 Russian HellKitsune 2017-01-24 23:25:16 631 Первая редакция (опубликовано)