- 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.
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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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So, is that all because you got +vd delta and got master?
Please answer it.
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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".
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.
tf is interesting in it?
also i know quite a lot of people who used chat gpt to solve it, where is your point?
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here is the chatGPT solution: https://mirror.codeforces.com/blog/entry/124045
AC with the same solution: https://mirror.codeforces.com/contest/1916/submission/239684864
another AC with the same solution: https://mirror.codeforces.com/contest/1916/submission/239681879
Note: you only had to ask chatGPT for n <= 11. You could copy the solutions for n = 1, 3, 5, 7 and 9.
for n >= 11, you can use the exact same solution. The solution for n = 11 has 99 numbers, meaning for any n given, you can pick n numbers and inflate them by adding 0's.
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the first one seemed to solve the problem by finding the pattern him(her)self?The first one did not find a pattern. The first one had the same solution given by chatGPT. They may have done it by bruteforcing though.
I wonder how GPT can find them faster than one’s codethe first link given has a comment that states:"The latest ChatGPT can run Python code online" — https://mirror.codeforces.com/blog/entry/124045?#comment-1101145
If chatGPT has the correct code to generate the numbers, you won't have to implement it. It can be faster for those that could not solve D normally.
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
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.
Agreed :), When it clicked for me, I felt it was such a cool pattern
when it clicked for me, i thought wow, what a shit problem
Agree:)I was really excited when I suddenly found it out.
same
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.
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.
74 : "I tried so hard for this round"
Bro don't try this hard you may harm your eyes by reading testers feedbacks