ChatGPT passed ABC280D under human coaching

Revision en1, by -14, 2022-12-05 08:18:58

The Problem

You are given an integer $$$K$$$ greater than or equal to $$$2$$$. Find the minimum positive integer $$$N$$$ such that $$$N!$$$ is a multiple of $$$K$$$.

Here, $$$N!$$$ denotes the factorial of $$$N$$$. Under the Constraints of this problem, we can prove that such an $$$N$$$ always exists.

Constraint: $$$2 \leq K \leq 10 ^12$$$

The submission

Here are the interactions. ChatGPT spoke Chinese to me (which I didn't figure out how to configure it), so I'd provide some translations here.

![](https://mirror.codeforces.com/d4cc97/Z4W(1%OCNLC5E4N2Y~D3KQE.png)

Human: (The problem statement with hint to use long long)

ChatGPT: We can use code to implement the above algorithm.

Commment: ChatGPT wrote a bruteforce algorithm, which is reasonable.

![](/predownloaded/28/51/2851f0b0301aea9225d3d2a2a72b3e33b779411a.png)

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en20 English -14 2022-12-06 12:54:39 6 Tiny change: '12}$\n\n[CodeGPT correc' -> '12}$\n\n[ChatGPT correc'
en19 English -14 2022-12-05 09:58:06 2 Tiny change: 'unexpected strong. H' -> 'unexpectedly strong. H'
en18 English -14 2022-12-05 09:23:57 261
en17 English -14 2022-12-05 08:58:22 0 (published)
en16 English -14 2022-12-05 08:57:35 26
en15 English -14 2022-12-05 08:57:04 2 Tiny change: '68c.png)\n\n' -> '68c.png)\n'
en14 English -14 2022-12-05 08:54:52 9 Tiny change: 't process when the ' -> 't process the case when the '
en13 English -14 2022-12-05 08:54:17 15 Tiny change: 'algorithm.\n\n![ ](/' -> 'algorithm. (Code follows)\n\n![ ](/'
en12 English -14 2022-12-05 08:53:57 4
en11 English -14 2022-12-05 08:53:45 542
en10 English -14 2022-12-05 08:52:19 10 Tiny change: 'd output n — 1 instead ' -> 'd output n-1 instead '
en9 English -14 2022-12-05 08:51:03 265
en8 English -14 2022-12-05 08:43:27 108
en7 English -14 2022-12-05 08:42:22 542
en6 English -14 2022-12-05 08:38:04 455
en5 English -14 2022-12-05 08:34:06 170
en4 English -14 2022-12-05 08:32:47 781
en3 English -14 2022-12-05 08:27:00 78 Tiny change: 'orces.com/d4cc97/2.png)' -> 'orces.com/f49f77/2.png)\n\n'
en2 English -14 2022-12-05 08:25:03 164
en1 English -14 2022-12-05 08:18:58 983 Initial revision (saved to drafts)