An Animal Contest 2

Welcome to An Animal Contest! This contest will be themed around koalas!

The Problem Setters are dxke02, sjay05, samliu12, danielz1000, WilliamWu277, ThingExplainer, and Plasmatic.

Special thanks to Encodeous, feliser, Dan13llljws, johnroo2, Brian_Li23, Tmaswang03, sleazywhale1, and mangoqwq for testing, feedback, and assistance with the problems!

Special shout-out to Riolku for helping us organize the contest!

The contest will run from May 7th, 00:00 EDT to May 10th 00:00 EDT. You will have a three hour window to solve 6 main problems of roughly increasing difficulty ranging from CCC Junior to CCC Senior. The contest will also feature a 7-th problem (Problem 0) for students who are just getting started with programming.

Here are the parameters of the contest:

Contest duration: 3 hours.
Number of problems: 7, full feedback (you will see the results of your submissions instantly). Problem 0 will be worth 30 points, and the rest will be worth 100 points. Some problems will offer partial marks in the form of subtasks.
Scoreboard will be hidden, until your window is over. Divulging the contents of the scoreboard to participants who have not finished their window is an offense, the punishments of which are listed below.
No incorrect submission penalty.
There will be no submission limit.
Ties in score will be broken by the sum of the last submission times that increased your score.
Checkers for problems: Unless otherwise specified, standard.
This contest was run with a rating ceiling of 2199 under the legacy TopCoder rating system..
All problems are guaranteed to be solvable in PyPy 3, Java and C++.

Before the contest date, you may wish to check out the tips and help pages.

We have listed below some advice as well as contest strategies:

Remove all extra debugging code and/or input prompts from your code before submitting. The judge is very strict — most of the time, it requires your output to match exactly.
Do not pause program execution at the end. The judging process is automated. You should use stdin / stdout to perform input / output, respectively.
Python users are recommended to use PyPy 2/3 over Python 2/3 when submitting.

At the end of the contest, you may comment below to appeal a judging verdict. In the case of appeals, the decision(s) of DMOJ staff is final.

Clarification requests for the contest must be routed through the clarification system provided on DMOJ, and not through other channels including but not limited to Discord and Slack. Furthermore, all clarification requests will be handled the way they normally are in IOI. Note that, in particular, clarification requests must come in the form of yes/no questions.

Due to rampant issues with cheating on contests that has happened recently, any suspicious behavior during the contest window may result in your rating being impacted negatively. Such behavior includes, but is not limited to:

Divulging the contents of the scoreboard to participants who have not finished their window.
Registering for the contest with at least two accounts.
Participating in the contest with an account that is not your primary account.
During the contest window, talking about the contest in more detail than answering a yes/no question about whether one participated in the contest. This includes, but is not limited to, posting spoilers about the contest and public speculation of the contest.
Attempting to exploit bugs in the platform to subvert the constraints of the contest.

Punishments may include performance being unrated or, for more serious infractions, being forcibly ranked at the bottom of the scoreboard.

At the end of the contest, you may comment below to appeal a judging verdict. In the case of appeals, the decision(s) of DMOJ staff is final.

Problems

Problem	Points	AC Rate	Users	Editorials
An Animal Contest 2 P0 - Koala Matchmaking	3	50.1%	1170	Editorial
An Animal Contest 2 P1 - Koala Konundrum	5	44.5%	487	Editorial
An Animal Contest 2 P2 - Koala Party	5p	16.5%	290	Editorial
An Animal Contest 2 P3 - Koala Balloons	12p	15.5%	184	Editorial
An Animal Contest 2 P4 - Koala Gambling	12	19.7%	195	Editorial
An Animal Contest 2 P5 - Koala Carnival	15p	34.1%	95	Editorial
An Animal Contest 2 P6 - Koala Transport System	17p	22.2%	61	Editorial

Comments

4

Kirito commented on May 16, 2021, 5:00 p.m. ← edit 2 →

Ratings for An Animal Contest 2 have been finalized. If you wish to dispute your disqualification, please email us at contact -at- dmoj -dot- ca, or message us on the DMOJ Discord.

Note that the rating computation system has been changed slightly, so your rating may be slightly different. This change has been applied retroactively to all contests, so your rating may have changed by a few points even if you did not write this contest.

2

qiao_yun20060930 commented on May 12, 2021, 3:01 a.m.

My rating doesn't make any sense any could explain it

-7

ryanguorocket commented on May 12, 2021, 9:18 p.m.

legendary

This comment is hidden due to too much negative feedback. Show it anyway.

2

c_zqz commented on May 19, 2021, 8:34 a.m. ← edit 2 →

future CCO qual is such a chad

6

Kirito commented on May 12, 2021, 4:07 a.m.

There does not appear to any issues with your rating.

8

Kirito commented on May 10, 2021, 5:39 a.m. ← edited →

There are currently errors with rating this contest, an update will be posted once this is fixed.

Update: preliminary ratings are out.

1

qiao_yun20060930 commented on May 12, 2021, 3:01 a.m.

Could you help me on rating, it doesn't make any sense, please

12

billsboard commented on May 4, 2021, 9:44 p.m.

Friendship ended with Alpaca?

11

Dan13llljws commented on May 6, 2021, 12:01 a.m.

We are all followers of bruce

12

WilliamWu277 commented on May 4, 2021, 11:08 p.m.

Alpacas are in the past! We must embrace the future and admit that Koalas are the hot stuff! Forget alpacas. Koalas are the new trend!