Educational Codeforces Round 17
Difference between en6 and en7, changed 714 character(s)
Hi!↵

After a long break, on [Jan 25, 17:35 MSK](https://www.timeanddate.com/worldclock/fixedtime.html?msg=Educational+Codeforces+Round+17&iso=20170125T1735&p1=166) 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 [user:MikeMirzayanov,2017-01-24] and me. Thanks to [user:fcspartakm,2017-01-24] 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](http://mirror.codeforces.com/blog/entry/50010)


**UPD3:** Challenge phase is over! Congratulations to winners:↵

1. [user:eddy1021,2017-01-26]↵
2. [user:W4yneb0t,2017-01-26]↵
3. [user:kmjp,2017-01-26]↵
4. [user:LHiC,2017-01-26]↵
5. [user:Narenji58,2017-01-26]↵

Also, top hackers!↵

1. [user:halyavin,2017-01-26] +249 : -35↵
2. [user:step_by_step,2017-01-26] +82 : -11↵
3. [user:-Morass-,2017-01-26] +51 : -141↵
4. [user:MishaPrigara,2017-01-26] +50 : -5↵
5. [user:uwi,2017-01-26] +46 : -9↵

If you want to share your ideas about tasks for next Educational Rounds, you can use the new [problem proposal form](http://mirror.codeforces.com/proposals/new-problem). 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://mirror.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)