DmitriyH's blog

By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English

Consider the following Div. 1 rounds:

Codeforces Round #236 (Div. 1)
Codeforces Round #238 (Div. 1)
Codeforces Round #239 (Div. 1)

      Registrants Participants
#236:        1011    616 (61%)
#238:        1052    608 (58%)
#239:         774    538 (70%)

At least, 30% of registered users didn't participate in the rounds.
Do you wonder, what they really do? Do they read the problem statements or not?

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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English

Codeforces Round #243 Statistics

Codeforces Round #243 (Div. 1) and Codeforces Round #243 (Div. 2) round statistics

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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English

Brief data of Codeforces #229 — #233 Rounds statistics

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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English
 
 
 
 
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By DmitriyH, 8 years ago, In English

Good Bye 2013 round statistics

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By DmitriyH, 8 years ago, translation, In English

Round statistics sample

Here

Values meaning


Sentparticipants count, who made at least one problem submission
Pretestparticipants count, who's solution stuck on pretests
Hackedparticipants count, who's solution was hacked, and didn't pass hack sample
Systestparticipants count, who's solution stuck on system tests
Acceptedparticipants count, who solved the problem
Attemptsattempts count for the problem
Success %Accepted count / Attempts count
Severity — average attempts count among participants, who solved the problem
Median Score — median score value for solved problem
Hacks — successful(+) and unsuccessful(-) hacking attempts count (invalid tests and compilation errors are ignored)

Graphic representation of Pretest / Hacked / Systest / Accepted columns.
Right-most value — participants count.

Used stuff

Standing pages parsing: Google Chrome + javascript.
Tables and graphs drawing: Google Charts.
Manual actions: Paint.NET + Notepad++ :)

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