KbltQaQ's blog

About Goodbye 2023
By KbltQaQ, history, 5 months ago, In English
  • Many people don't like D, and I'm the same, because most people pass by writing brute force to find patterns. I gave feedback, but 74 ignored it.
  • The description of F is particularly verbose, I suggest adding a formalized problem statement, but 74 also ignored it.
  • G was also an original problem before, it was a JOISC problem, I found it about a week before the contest, and then replaced it with this question.
  • The responsibility for H should not be borne by the question setter, the coordinator should be responsible for checking for duplicates and other miscellaneous matters, otherwise what is the purpose of the coordinator's existence?
  • Not responding to the tester's feedback, and not caring about checking for duplicates in the questions, and even did not prove the solution before the contest. This is 74.
  • Vote: I like it
  • +150
  • Vote: I do not like it

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5 months ago, # |
← Rev. 2   Vote: I like it -11 Vote: I do not like it

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    5 months ago, # ^ |
    ← Rev. 3   Vote: I like it 0 Vote: I do not like it

    is that all because you got +vd delta and got master?

    and about D being alright, ABC are solvable in <1 hour, you literally have enough time to ask chat gpt to give you the possible solution for each number from 1 to 99, which will obviously wont take more than 1 hour.

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      5 months ago, # ^ |
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        5 months ago, # ^ |
          Vote: I like it +2 Vote: I do not like it

        So, is that all because you got +vd delta and got master?

        Please answer it.

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          5 months ago, # ^ |
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            5 months ago, # ^ |
            ← Rev. 2   Vote: I like it 0 Vote: I do not like it

            No, beacuse I did solve it. Why can't I say that it is a bad problem?

            upd: In fact, when I worked out the solution, what I feel is not "Awww so awesome I'm so clever". It is "how tf the problem is in a contest".

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            5 months ago, # ^ |
              Vote: I like it +4 Vote: I do not like it

            Well said, "is that all because you got +vd delta and got master?" is not a good argument to come up with when trying to convey that problem D is bad.

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        5 months ago, # ^ |
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        tf is interesting in it?

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        5 months ago, # ^ |
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        also i know quite a lot of people who used chat gpt to solve it, where is your point?

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      5 months ago, # ^ |
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      bruteforcing is so much saver and faster than chatGPT. Even if you ask chatGPT, you also have to write a checker to verify it is giving you correct solutions.

      My opinion about the contest (A-D) is this: fun problems, but bad for contest. Problem A didn't have strong enough test cases, Problem B was too mathematical, Problem D was (slowly) solvable by GPT.

      It's not that bad however. The real problem was that Problem H was solvable with oeis

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5 months ago, # |
← Rev. 2   Vote: I like it +29 Vote: I do not like it

D is not bad. As n is odd specified it mostly gives away that it is some pattern finding and involes 0s as same digits. Bruteforce may not guanrentee > 90 size. So bruteforce is more difficult.

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    5 months ago, # ^ |
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    Agreed :), When it clicked for me, I felt it was such a cool pattern

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      5 months ago, # ^ |
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      when it clicked for me, i thought wow, what a shit problem

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    5 months ago, # ^ |
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    Agree:)I was really excited when I suddenly found it out.

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    5 months ago, # ^ |
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    same

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5 months ago, # |
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because most people pass by writing brute force to find patterns.

Actually I think that's a common method to solve a constructive problem.You don't have to prove everything during a contest.

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5 months ago, # |
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I don't think D is bad at all. I gracefully solve it through primary school math and observation from sample 3. If you (or anyone else) waste time writing a bruteforce code to solve it and get a lot of penalty, it's your (or their) own problem.

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5 months ago, # |
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74 : "I tried so hard for this round"
Bro don't try this hard you may harm your eyes by reading testers feedbacks

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