Franklyn_W's blog

Problem D on today's contest?
By Franklyn_W, history, 9 years ago, In English

http://codeforces.net/predownloaded/db/71/db71b835b400d96d1a046c43b07dccaf4d297a23.png

How did this even happen?

It says that the constraints are 0 ms and 0 MB?

  • Vote: I like it
  • +7
  • Vote: I do not like it

»
9 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Auto comment: topic has been updated by Franklyn_W (previous revision, new revision, compare).

→ Reply
»
9 years ago, # |
  Vote: I like it +3 Vote: I do not like it

And it throws "Can't read or parse problem descriptor" for me in virual contest.

→ Reply
»
9 years ago, # |
← Rev. 2   Vote: I like it +3 Vote: I do not like it

I'm still investigating this task and here what I have:

  • submission with EPS = 1e-14 gives wrong answer on test #134: 200.0 200.0 200.0: 15719829,
  • the same code with EPS = 1e-13 gives AC: 15719618.

I've logged the difference between two values of m * log(m) + log(log(m)) for m = 200.0 in first case and it appears to be ~5e-14, so this is the reason. But when I'm trying to reproduce this problem manually (see main at 15719829), it is giving zero difference. On my mac with clang 6.0 compiler case 200.0 200.0 200.0 gives proper answer: x^y^z. Can anyone help?

→ Reply
  • »
    »
    9 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    I think the post is about that problem D is not opening anymore.

    → Reply
    • »
      »
      »
      9 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      You're right, moving it to the editorial post.

      → Reply
»
9 years ago, # |
  Vote: I like it +16 Vote: I do not like it

Sorry, I accidentally click "Discard" button. Now it is recovered. Peace.

→ Reply