Invitation to Alkhwarizm — 2019 by IIIT Allahabad

Revision en23, by shivamg_isc, 2019-04-08 12:23:48

Aparoksha is back with the flagship coding event — Alkhwarizm

2 years back, we launched the first ever External Rated Contest on CodechefAlkhwarizm 2017.
Last year's Alkhwarizm 2018 was a great success with over 1100 people participating in the contest.
If you have the appetite for algorithmic problem solving, then don't miss it out!

Contest link is here — Alkhwarizm 2019

It will be a 5 hour individual contest with algorithmic problem-set of diverse nature, and is open for both students as well as professionals.
The contest will comprise 10 problems, and will be rated for both divisions.

The prizes include cash prizes worth INR 20,000, along with Codechef Laddus.

  • For Indian participants:
    • Top 10 from ranklist will receive 300 laddus.
    • Additionally, they get bonus laddus (Bonus = n — contest rank) where 'n' is 11 for short contests.
  • For Global participants:
    • Top 10 from ranklist will receive 300 laddus.
    • Additionally, they get bonus (Bonus = n — contest rank) where 'n' is 11 for short contests.
  • For combined participants:
    • Random Laddus to any 5 users: 200 laddus.
    • First to solve each problem individually: 100 laddus.
    • Country wise participation: Top 10, 20 and 30 will get 30, 40 and 50 laddus as per participation.
    • Country wise performance: 200, 250, 300 laddus as per performance.

So be ready to have a nail-biting experience on April 7, 2019 at 21:00 IST

The problem have been set and tested by satylogin, blake_786, shivamg_isc, priyanshupkm, modi_aashu2 and fLUKEmASTER.

Some of our previous contests — CodeRed 2019, Alkhwarizm 2018, CodeRed 2018, Alkhwarizm 2017, and HumbleFool Cup 2016.

Register here to be eligible to sit on the Iron Throne.

Good luck everyone !

Upd 1 — The contest is about to begin in 1.5 hours.
Upd 2 — The contest is over. Thanks for the huge participation.
And we are sorry for this unbalanced contest.
The initial version of the contest was perfectly balanced. But, each problem of external rated contest has to be reviewed by few people from Codechef.
The initial version of the contest was told to be made rated just for Div 2.
The problem right now with 3rd least number of submissions was marked by them as an EASY-MEDIUM problem, and similarly were the others.
We tried to convince them to make the contest rated for all, as we felt the contest was indeed balanced.
But, finally in order to make the contest rated for all, we had to add harder elements to most of the problems.

We in a way could have agreed to keep the contest rated for just div 2, but that would remain unbalanced for them similarly.
We are sorry again, but please try to understand that the error was not on our part entirely.

Thanks !

The hints will be posted soon.

Upd 3

The hints are as follows —

Danny Wants To Know
Weirwood Trees
They are COMING
Arya and the Grid of Stars
Winter Is Here
Cersei and her Soldiers
Game of Theory
Our Enemy does not Tire
Conquer Beyond the Wall
I Promised to Fight for the Living

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en31 English shivamg_isc 2019-04-08 13:06:07 101
en30 English shivamg_isc 2019-04-08 12:44:16 4 Tiny change: 's changed to a value $' -> 's changed by a value $'
en29 English shivamg_isc 2019-04-08 12:33:04 4 Tiny change: 'd finding put the contr' -> 'd finding the contr'
en28 English shivamg_isc 2019-04-08 12:30:25 2 (published)
en27 English shivamg_isc 2019-04-08 12:30:10 60
en26 English shivamg_isc 2019-04-08 12:29:30 16
en25 English shivamg_isc 2019-04-08 12:28:56 216
en24 English shivamg_isc 2019-04-08 12:25:19 4 Tiny change: 'tring , $K = s[1] + '#'' -> 'tring , $K$ = $s[1] + '#''
en23 English shivamg_isc 2019-04-08 12:23:48 1815
en22 English shivamg_isc 2019-04-08 12:02:56 1145
en21 English shivamg_isc 2019-04-08 11:21:52 6
en20 English shivamg_isc 2019-04-08 11:20:24 1329
en19 English shivamg_isc 2019-04-08 11:14:30 2 Tiny change: ' the $A_i$’s and $B_i$’s. \n**' -> ' the $A_i$ ’s and $B_i$ ’s. \n**'
en18 English shivamg_isc 2019-04-08 11:12:03 1 Tiny change: ' all $x_i$’s of pair' -> ' all $x_i$ ’s of pair'
en17 English shivamg_isc 2019-04-08 11:11:44 3 Tiny change: ' all $y_i$’s of pair' -> ' all $y_i$ ’s of pair'
en16 English shivamg_isc 2019-04-08 11:09:58 1232
en15 English shivamg_isc 2019-04-08 11:00:29 799
en14 English shivamg_isc 2019-04-08 10:56:52 89
en13 English shivamg_isc 2019-04-08 10:55:22 1061
en12 English shivamg_isc 2019-04-08 10:45:27 21
en11 English shivamg_isc 2019-04-08 10:44:07 1219
en10 English shivamg_isc 2019-04-08 10:37:59 760
en9 English shivamg_isc 2019-04-08 10:32:14 6 Tiny change: 'dges = $2^(n + 1) - 2$, Top' -> 'dges = $2^{(n + 1)} - 2$, Top'
en8 English shivamg_isc 2019-04-08 10:31:28 1375 (saved to drafts)
en7 English shivamg_isc 2019-04-07 23:54:11 1080
en6 English shivamg_isc 2019-04-07 16:57:49 73
en5 English shivamg_isc 2019-04-06 19:57:29 0 (published)
en4 English shivamg_isc 2019-04-06 19:56:58 15 Tiny change: 'u68D6) to sit on' -> 'u68D6) to be eligible to sit on'
en3 English shivamg_isc 2019-04-06 19:55:47 2 Tiny change: 'ticipants:\n - ' -> 'ticipants:**\n - '
en2 English shivamg_isc 2019-04-06 19:53:47 241 Tiny change: 'KH2017/), [HumbleFo' -> 'KH2017/), and [HumbleFo'
en1 English shivamg_isc 2019-04-06 19:49:19 2507 Initial revision (saved to drafts)