Блог пользователя ToniB

Автор ToniB, 3 недели назад, По-английски

Hi everyone!

The second round of COCI will be held tomorrow, November 9th at 18:00 UTC. You can access the judging system here. If you are not familiar with the COCI contest format, we encourage you to read the announcement.

The round was prepared by jklepec, celin, fbabic, vito1036, itiamhr, and me.

Feel free to discuss the problems in the comment section after the contest ends.

Hope to see you tomorrow!

  • Проголосовать: нравится
  • +45
  • Проголосовать: не нравится

»
3 недели назад, # |
Rev. 2   Проголосовать: нравится -18 Проголосовать: не нравится

hello! it is possible to make sure that the cf round 985 and the 2nd round of COCI do not overlap. I like your contests and I would participate in your round, but the fact is that my life depends on the 985th round of cf (I'm serious). sorry for my poor english.

  • »
    »
    3 недели назад, # ^ |
      Проголосовать: нравится +18 Проголосовать: не нравится

    They do not overlap. COCI starts 25 minutes after the CF round ends.

»
3 недели назад, # |
Rev. 2   Проголосовать: нравится -18 Проголосовать: не нравится

There seems to be some discrepancy with the time. Evaluator shows the start time to be 14UTC (15 In Croatia) but here it is written to be 18 UTC.

  • »
    »
    3 недели назад, # ^ |
      Проголосовать: нравится +18 Проголосовать: не нравится

    The time on evaluator is set by default. It will be changed to 18:00 UTC before the contest begins.

»
3 недели назад, # |
Rev. 2   Проголосовать: нравится -44 Проголосовать: не нравится

Now I found out that the time has changed (4 hours later than the previous time).I canceled one of my important football matches for the COCI Olympiad(I didn't know times had changed).Newest Start time COCI will be late for me, so I will not participate.It is not good to change time.

»
3 недели назад, # |
Rev. 2   Проголосовать: нравится +10 Проголосовать: не нравится

the problems were so nice 🤩

but I faced something weird in the problem Blistavost

I wrote this code and it got 55 points from the third subtask but didn't get the 20 points from the first subtask (while the both of them have the same condition $$$l_i = r_i$$$ for each $$$i$$$)

here is my code, I really don't know why it worked for the third subtask and didn't work for the first one 😅

Spoiler
  • »
    »
    3 недели назад, # ^ |
      Проголосовать: нравится +11 Проголосовать: не нравится

    Hi, I prepared the test data for this task. It turned out that when n is big and the test cases are generated randomly, there is a high probability that you should just go from left to right(which is obviously incorrect). We apologize to the affected users for the inconvenience.

»
3 недели назад, # |
  Проголосовать: нравится 0 Проголосовать: не нравится

How to solve the last problem?

»
3 недели назад, # |
  Проголосовать: нравится +9 Проголосовать: не нравится

There's no limit on $$$\sum m$$$ in problem E? Then we need to read $$$10^8$$$ edges bro