Lunchtime Diary, Entry Number 31 – The December Lunchtime

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Date: 27th December 2015 Time: 11 AM IST Venue: https://www.codechef.com/LTIME31 Event: December Lunchtime 2015

Team A: Distinct Codes (DISTCODE) Ancient Berland Road (ABROADS) Computer Network (EXNETWRK) Buying Seedlings (SEEDLING) Team B: 856 young programming enthusiasts

The challenge began with a flurry of submissions for Distinct Codes that got close to 50% correct submissions ( specifically – 48.66%). Some familiar names kept coming up on the rank tables, case in point kmcode of Omori 7th Junior High School, ptnk131627 of VNU-HCM High School for the Gifted Vietnam and mbrc of South Point High School.

As the young coders raced ahead, they found the Ancient Berland Road to be a tricky terrain. Many slipped, got back up and slipped again as the problem proved a mighty challenger. With 12.99% accuracy on the problem, ABROADS certainly had everyone sweating. Sadly for the coders from Team B it was just a preview of what was to come next.

What’s next you ask? Only the 2nd hardest challenge problem. Computer Network was more like a net of complexity from what our young coders’ submissions told us. Let us throw in some statistics again – what better way is there to show how good a job the problem setters did? 38 submissions with a full score and an accuracy of 5.49% EXNETWRK was the second but last obstacle in the challenge.

Buying Seedlings, is an innocent name for something that has the ferocity of the Terminator. If Jack had bought these instead of the beanstalk beans, he would be in a different kind of hell, even without the giant from his original story. With a total of only 5 full scores, this timid sounding problem painted the submission table red much to the coders’ dismay.

Sitting on the sidelines, watching the challenge go down is interesting to watch, but a huge shout out to our young coders’ enthusiasm that makes us want to host Lunchtime month after month. Another thanks to the following people that make it possible. December Lunchtime: Problem setter & Editorialist: Sergey Kulik Problem Tester: Pavel Sheftelevich Here are some stats to look at: Total users who made a submission: 913 Total Submissions: 4190 Number of distinct users with correct submissions: 856 And now, the winners who braved it all and kept going.

India Winners

ROW Winners

  • waterfalls Catlin Gabel School
  • rajat1603 Delhi Public School, Dwarka
  • ptnk131627 VNU-HCM High School for the Gifted Vietnam
  • yutaka1999 Kaisei Junior High School and Senior High School, Japan
  • kmcode Omori 7th Junior High School
  • na2a Aktobe Kazakh -Turkish High School
  • animesh_f La Martiniere for Boys, Calcutta
  • additya1998 Delhi Public School, Dwarka
  • capawesome Nancho Popovich Maths and Science High School
  • aktl Almaty Kazakh – Turkish High School
  • nurbakhyt Almaty Kazakh – Turkish High School
  • anuartb Aktobe Kazakh -Turkish High School

That’s all from December Lunchtime 2015. Watch this space for more contest reports. Until next time then!

Cheers,
Rhuta
Team CodeChef

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