ICYMI: Here’s our Recap of CodeChef’s June Lunchtime

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Close on the heels of the exciting June CookOff, we bring you our recap of June Lunchtime. Continue reading to get our full in-depth coverage of the contest.

In Div A, a total of 8 participants managed to score a perfect 500. gennady.korotkevich, with overall Global Rank 1, led the charge, securing the first position in this contest. The 7-star from Belarus managed to further solidify his unsurpassed rating by adding another 60 points, finishing at jaw-dropping 3488. This is Gennady’s first contest appearance in months, having undergone a period of dormancy since January this year. The 2nd and 3rd positions were secured by gainullinildar from Russia and uwi from Japan. With this contest, gainullinildar made a re-entry into the elusive 7-star club, improving his rating by 138 points. The others to manage a perfect score were: natsugiri, tautsjasiunsas, andrey_efremov, mohammed200218, and yamunaku.

Over in Div B, compiler_101 and oahcc were the only two participants to score 500, ranking 1st and 2nd in the contest, respectively. compiler_101 , student in Cairo, added 191 points, and consequently, made the jump from Div B to Div A. Parallely, oahcc also levelled up from Div B to Div A, increasing his rating by 169 points. Amongst school students, 4 finished in the Top 10 for Div A; while 3 managed to secure a spot in the Top 10 for Div B.

Overall, 93 participants jumped from Div B to Div A. While simultaneously, 30 coders slid down from Div A to Div B. Meanwhile, fly_37, adibov and ultrac emerged as the biggest gainers in Div A, improving their rating by 186, 180, and 179 points, respectively. While in Div B, brayand and conformisto increased the rating by the largest margin, by 233 and 220 points, respectively.

Coming to the problems: PAJAPONG was the first problem to be successfully solved overall, with entry submitted by singhal_coder in Div B, in just 3 minutes after the commencement of the contest. In Div A, BURARRAY was the first scorable problem to receive a successful entry, made by chandler_1729 in the 7th minute. Funnily enough, for both Div A and B, the last scorable problem to be cracked was FUZZYCON.

As we conclude this recap, we express our immense gratitude to our June Lunchtime problem setting panel:

Setters: Mladen Puzić (thesitzr), Raj Khandor (hackslash_123)

Tester: Michael Nematollahi (watcher)

Editorialist: Taranpreet Singh (taran_1407)

Statement Verifier: Jakub Safin (xellos0)


  • Mandarin Translator: Hu Zecong (huzecong)

  • Vietnamese Translator: Team VNOI (songuku95)

  • Russian Translator: Fedor Korobeinikov (gomelfk)

  • Bengali Translator: Mohammad Solaiman (solaimanope)

  • Hindi Translator: Akash Srivastava (devils_code)

Lastly, a big thank you to our admin Hasan Jaddouh (kingofnumbers) whose hard work allowed us to pull the contest with such ease.

Do let us know your thoughts on the June Lunchtime in the comments below. Plus, don’t forget to practice your problem solving skills and participate in the long form July Long Challenge, which began on 5th July. Until next time, keep practicing!

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