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Distributed Load Balancing
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Distributed Load Balancing Contest

Algotester together with Huawei announces the Distributed Load Balancing Scheduling Contest! In this challenge, individual participants will face an distributed optimization problem and after two weeks long battle the top performers will be awarded with cool prizes:

The final testing is over. Congratulations to the winners! Prix du Jury goes to Yevhen Nasonov!

Provisional Score
Final Score
1 Philippe Ribet ENAC, France 22  386  832 74  002  862 325:44:14
2 Dmytro Balaban NU Odesa Polytechnic 22  223  147 73  685  109 278:08:24
3 Danylo🏋️‍♂️ Mocherniuk🏋️‍♂️ Ivan Franko Lviv NU 22  243  853 73  245  295 328:33:38
4 Yevhen Nasonov Kharkiv NU of Radio Electronics 22  076  714 73  220  871 328:16:50
5 Yevhen Zadorozhnii Professional 21  811  277 72  197  361 204:13:09
6 Богдан Пастущак Ivan Franko Lviv NU 22  136  917 72  082  683 285:24:25
7 Максим Щерба Ivan Franko Lviv NU 21  913  360 71  636  199 315:37:25
8 Oleg Vallas Kharkiv NU of Radio Electronics 22  327  406 70  755  834 310:18:08
9 Oguzhan Ozcelik Bilkent U 20  403  383 67  768  799 204:13:56
10 Hoang Ly Minh Other School 20  766  213 66  165  936 191:25:53
11 Василь Проців Ivan Franko Lviv NU 19  613  934 65  773  674 74:35:15
12 Max Kovalchuk Taras Shevchenko Kyiv NU 19  529  348 64  084  142 140:11:38
13 Yulian Yarema 😅🔫 Professional 19  945  299 64  065  089 318:19:12
14 Thang Nguyen Technical U of Munich 20  071  630 63  896  523 328:52:24
15 jean-claude charr Other School 19  433  302 62  654  872 47:08:29
16 Юрій Калічун Ivan Franko Lviv NU 19  332  040 61  835  903 0:23:49
17 Дмитро Гринишин Ivan Franko Lviv NU 19  332  040 61  835  903 13:43:45
18 Богдан Навальковський NU Lviv Polytechnic 19  332  040 61  835  903 17:26:13
19 Raphael Toumi Other School 19  332  040 61  835  903 38:29:34
20 Vlad Zavodnik Taras Shevchenko Kyiv NU 19  332  040 61  835  903 59:56:35
21 Роман Деркач Other School 19  332  040 61  835  903 62:15:55
22 Thomas Aquinas Professional 19  332  040 61  835  903 255:12:09
23 Isaias FARIA SILVA Professional 1  000  000 4  500  000 63:46:04
24-25 Kostiantyn Lutsenko Taras Shevchenko Kyiv NU 0 0 0:00:00
24-25 Andrei Arhire Alexandru Ioan Cuza U 0 0 0:00:00

How to compete

  1. If you don't have an account at Algotester, go ahead and create one.
  2. Sign in using your username (or email address) and password.
  3. If you are new to Algotester go through our Help section in order to understand how the system works.
  4. Follow this link to register for the Distributed Load Balancing Contest, then select your contestant category (your school or "Professional") and click the "Register" button.
  5. When the contest starts read the problem description.
  6. For a quick start, check sample solutions for available programming languages: C++, Java, C#, Pascal, Python and F#. Note that a sample solution submission should score 19 332 040 on the provisional tests. This can be considered as the first threshold you have to overtake.
  7. When ready submit your source code file or paste it into the embedded editor.
  8. All your attempts will be available on your contest submissions page.
  9. For announcements and Q&A go to the contest clarification page or use the contact form.


  1. The provisional competitor standings will be available to the public at the contest standings page.
  2. Read the problem description "Scoring" section for details on your submission evaluation.
  3. At your submissions page click a "Submission ID" link on the right and then go to the "Results" tab to see its details for each of the test cases.
  4. A test case result "Accepted" means that your solution has produced a valid output for this test case and received a corresponding score value, otherwise it failed to produce a valid solution within the given constraints.
  5. Your overall result is the maximum score of all your submissions and your penalty is the time elapsed since the contest start until you have recently improved your score.
  6. All competitors are sorted by the overall score (from larger to smaller) and then by the penalty time (from smaller to larger).
  7. When the contest is over the final testing will be triggered.
  8. The final results will be published within two weeks after the contest end.


  1. When the final results are published the top three eligible competitors can claim their prizes. Additionaly one extra prize can be awarder to a contestant according to the Jury's decision.
  2. In order to receive a prize, a winner has to provide a written report describing algorithms and data structures used in their solution.
  3. A notification email with detailed instructions will be sent to each of the winners.

Terms and Conditions

  1. Your agreement to these terms and conditions
    • 1.1 By registering for the competition, you accept these terms and conditions.
    • 1.2 In these terms and conditions where we refer to the ‘Participant‘, we mean either an individual that has registered to enter the competition on its own behalf.
  2. The Competition
    • 2.1 The competition aims to motivate research of Algorithmic Programming. It is run by Algotester (the "Organiser"), and the competition is sponsored by Huawei (the "Sponsor").
  3. Eligibility
    • 3.1 To be eligible to enter the competition, all Participants must
      • 3.1.1 have an email address through which the Organiser can communicate with the Participant in connection with the competition;
      • 3.1.2 be solely responsible for creating the competition submission.
    • 3.2 Other than the requirements set out in clause 3.1 above, there is no restriction in nationality or residence status of any such Participants.
    • 3.3 The Organiser’s employees, the employees of any company who are or were involved in creating or implementing the competition and their respective immediate family members, are excluded from participating in the competition.
    • 3.4 In entering the competition, Participants confirm that they are eligible to do so and acknowledge that they may be required to provide proof of their eligibility to enter. The Organiser reserves the right to verify the eligibility of all Participants and to disqualify anyone who it determines (at its sole discretion) are not eligible. The Organiser also reserves the right to disqualify Participants if their conduct is contrary to the spirit or intention of the competition or they are in breach of any of these conditions.
    • 3.5 Participation in the competition is free of charge and does not require the purchase of goods or services.
  4. How to enter
    • 4.1 The competition registration opens on 17-th November 2020. The Competition itself commences on November 23-rd 2020 and ends at midnight on 6-th December 2020 (the "Deadline"). Any competition submission after the Deadline will be automatically rejected.
    • 4.2 Participants can use any of the competition programming languages they wish. However, any cheating is not permitted and any such entries will be disqualified.
    • 4.3 Participants are permitted to submit a maximum one entry per 60 minutes only to the competition.
    • 4.4 The Organiser and Sponsor accept no responsibility for incomplete, incorrect, lost or delayed entries to the competition regardless of cause, including, for example, any malfunctions or failures in the Evaluation System, any equipment failure, technical malfunction or systems, network, server, computer hardware or  software failure of any kind.
  5. Determination and notification of winners
    • 5.1 The final ranking and the competition winners will be announced until midnight on 20-th December 2020.
  6. The Prizes
    • 6.1 The competition prizes are as listed below:
      • First prize: Huawei Mate Xs.
      • Second prize: Huawei P40.
      • Third prize: Huawei MatePad Pro.
      • Prix du Jury: Huawei Watch GT 2 can be awarded to one contestant based on the Jury's decision.
    • 6.2 The winners will be responsible for any taxes or charges incurred in claiming their respective prize.
    • 6.3 The Organiser or Sponsor shall not be responsible or accept any liability in respect of the inability of a winner to take up a prize.
    • 6.4 Prizes are subject to availability and the Organiser reserves the right to replace the prize with an alternative prize of equal or higher value if circumstances beyond the Organiser’s control make it necessary to do so.
    • 6.5 The prize is not negotiable. Exchange of a prize or their transfer to other persons is excluded.
  7. Rights of Use
    • 7.1 The Participant acknowledges that the Organiser and Sponsor’s Material is owned by the Organiser and Sponsor and that the Participant is only permitted to use, for the duration of the Competition only, the Organiser and Sponsor’s Material in order to test and submit entries to the competition.
    • 7.2 The Participants agree to keep the Organiser and Sponsor’s Material confidential and shall not disclose them to any other individual or entity.
    • 7.3 The Organiser acknowledges that the code created and used by the Participants submitted as a competition entry (the "Code") is owned by the submitting Participants.
    • 7.4 The Participants warrant that the Code will not infringe any third party rights, including copyright and other intellectual property rights (e. g. patents, trademarks, design rights, know-how etc.) and that the Participants have the right to grant a license to the Organiser and Sponsor in accordance with clause 7.5.
    • 7.5 The Participants hereby grant the Organiser and Sponsor a non-exclusive limited right to access and create copies of the Code, for the purpose of evaluating that the submission to enter the competition is valid and that it otherwise complies with these conditions.
    • 7.6 The Participants hereby agree to give the Sponsor, for a period of 1 year from the date submitted its Code by the Participants on the Evaluation System, the exclusive right of first refusal to exploit the Code, on such terms as the Sponsor and the Participants may agree separately in writing.
    • 7.7 If the Sponsor and the Participants cannot agree terms in connection with the Code within 3 months of the Sponsor first notifying the Participant that it would like to exploit the Code, then the Participants will be entitled to enter into negotiations and conclude an agreement with any third party with a view to such third party acquiring those rights provided that the Participants will not agree terms with any third party that are less favourable to the Participants than those which were proposed by the Sponsor.
  8. Limitation of Liability
    • 8.1 Insofar as is permitted by law, the Organiser and the Sponsor, and its agents or distributors will not in any circumstances be responsible or liable to compensate a winner or accept any liability for any loss, damage, personal injury or death occurring as a result of taking up a prize except where it is caused by the intentional behaviour of the Organiser or Sponsor, and its agents or distributors or that of their employees. A winner‘s statutory rights are not affected.
    • 8.2 Participants acknowledge that the Organiser accepts no responsibility for any communications exchanged between Participants.
  9. Data Protection and publicity
    • 9.1 By entering into this competition, the Participants agree to provide their personal information which will be used and disclosed by the Organiser and its authorized agents for the purposes of competition administration and prize fulfilment.
    • 9.2 Winners agree that the Organiser can use their name and photograph in promotional material in all formats worldwide, to publicise the winners of the competition, without any need or obligation to recompenses the Participants accordingly.
  10. Miscellaneous
    • 10.1 In the event of circumstances outside the reasonable control of the Organiser or otherwise where fraud, abuse, and/or an error (human or technical) affects or could affect the proper operation of this competition or the awarding of prizes, the Organiser reserves the right to cancel or amend these conditions at any stage of this competition, but will endeavor to minimise the effect to Participants in order to avoid undue disappointment.
    • 10.2 If there is any conflict between the terms of these conditions and the Privacy Policy and Terms of Use of the Evaluation System, these conditions will prevail.
    • 10.3 These terms and conditions shall be governed by Ukrainian law and the parties submit to the exclusive jurisdiction of the courts of Ukraine.