antontrygubO_o's blog

The 1st Universal Cup. Stage 4: Ukraine
By antontrygubO_o, 21 month(s) ago, In English

Hello everyone! The 4th Stage of the 1st Universal Cup: Ukraine, will be held on Feb 18th, 2023.

The contest is based on 1/8 and 1/4 Ukrainian stages of SEERC 2023, plus some extra problems. Please, don't participate, if you have seen these problems. This contest also serves as Day 1 in Osijek Competitive Programming Camp 2023 on February 18, 2023.

Author of all problems: antontrygubO_o. I hope you like the problems.

You can participate in the contest in the following three time windows:

  • Feb 18th 13:00 — 18:00 (UTC +8)
  • Feb 18th 19:00 — 24:00 (UTC +8)
  • Feb 19th 02:00 — 07:00 (UTC +8)

Please note that you can see two scoreboards in DOMjudge. The 'Local Scoreboard' shows the standings ONLY IN THE CURRENT TIME WINDOW. And the 'Combined Scoreboard' shows all participants, including the onsite participants, and the cup participants in the previous time windows.

Contest link: https://domjudge.qoj.ac/

Universal Cup Scoreboard: https://qoj.ac/ucup/scoreboard

About Universal Cup:

Universal Cup is a non-profit organization dedicated to providing trainings for competitive programming teams. Up to now, there are more than 200 teams from all over the world registering for Universal Cup.

A more detailed introduction: https://codeforces.net/blog/entry/111672

Register a new team: https://ucup.ac/register

UPD1: Thanks for your participation! Here is Editorial.

I also uploaded contest to gym: Anton Trygub Contest 1 (The 1st Universal Cup, Stage 4: Ukraine).

I hope to add ghost participants by tomorrow.

  • Vote: I like it
  • +373
  • Vote: I do not like it

Comments Comments (18)
| Write comment?
»
21 month(s) ago, # |
  Vote: I like it -7 Vote: I do not like it

Can i participate SOLO without team ?

→ Reply
  • »
    »
    21 month(s) ago, # ^ |
      Vote: I like it +42 Vote: I do not like it

    Yes, you can, but please don't.

    → Reply
    • »
      »
      »
      21 month(s) ago, # ^ |
        Vote: I like it +1 Vote: I do not like it

      Why not? I think CP contests should be open.

      → Reply
      • »
        »
        »
        »
        21 month(s) ago, # ^ |
          Vote: I like it +47 Vote: I do not like it

        Because it's insanely hard for div2?

        → Reply
        • »
          »
          »
          »
          »
          21 month(s) ago, # ^ |
            Vote: I like it +21 Vote: I do not like it

          I think a contest being too hard should not be a reason someone is not allowed to participate.

          → Reply
          • »
            »
            »
            »
            »
            »
            21 month(s) ago, # ^ |
              Vote: I like it +65 Vote: I do not like it

            I'm not saying he is not allowed, I mean that it's not fun for him to participate.

            → Reply
  • »
    »
    21 month(s) ago, # ^ |
      Vote: I like it +81 Vote: I do not like it

    jiangly did it, and got a high ranking :)

    → Reply
»
21 month(s) ago, # |
  Vote: I like it +70 Vote: I do not like it

can I solo?

→ Reply
»
21 month(s) ago, # |
  Vote: I like it -98 Vote: I do not like it

Can people from Russia take part in the contest?

→ Reply
»
21 month(s) ago, # |
  Vote: I like it +8 Vote: I do not like it

teammate needed for universal cup

Hi, we only accept very limited one-person teams. We cannot accept your application.

I got this mail from them

→ Reply
»
21 month(s) ago, # |
  Vote: I like it +10 Vote: I do not like it

How long does registeration usually take? I just sent an email a few hours ago and hoping to get registered by tomorrow's contest

→ Reply
  • »
    »
    21 month(s) ago, # ^ |
      Vote: I like it +40 Vote: I do not like it

    Hello! They are being processed. All the registration form sent before Feb 18th will be replied before the contest.

    → Reply
»
21 month(s) ago, # |
  Vote: I like it 0 Vote: I do not like it

How to approach C and / or N?

→ Reply
»
21 month(s) ago, # |
  Vote: I like it +5 Vote: I do not like it

A question about problem C.

For all prefixes,calculate the difference between the number of W and B,then answer is their product divide by 2(with some details).

I wrote it in the contest,and it is corect.Why?

Submission

→ Reply