Hello, Codeforces.
UPD: Round is finished. Thank you for your participation. Final results.
Today (16:00 UTC) we want you to take part in testing and unrated round with unussual scoring system. With your help we want to test new scoring, new type of problems and Codeforces system inside <iframe>
tag.
Start time is 16:00 UTC
There are two types of problems: logic puzzles and programming tasks.
A logic puzzle is a task that is designed to be solved by hand (but it is not forbidden to write some helper code to do this). Each logic puzzle consists of one or more tests. Each question can be answered separately from the others. There is a "Submit" button below each test. To answer the question, press "Submit" button. Your answer will be acknowledged and checked after the end of the contest. You can change your answer any number of times – only the last attempt is checked. For the correct answer to the question you will get the number of points which is indicated in the question description.
A programming task is want you can ussually see in Codeforces rounds. Solutions can be submitted at any time during the contest. A solution is evaluated on a fixed set of tests right after it is submitted. For each passed test, a contestant will get a fixed amount of points. The sum of points for all passed tests is the total points received by the solution. The contestant can submit a solution several times. The contestant will receive points for only one solution per problem. The solution with the maximum amount of points will be chosen.
The contest period is divided into two sections: Normal Time (NT) and Extra Time (ET). Each contestant is in only one of these at a time, but which one you're in can vary per contestant. In other words, when one contestant is in Normal Time, another one could be in Extra Time.
Normal Time lasts for at most 30 minutes starting from when you click the button "Start Contest". (It could be less than 30 minutes if you start the contest less than 30 minutes before it ends). Points gained in Normal Time are the main way of deciding who wins. A participant with more points gained in Normal Time will always have a better ranking than a participant gaining fewer points in Normal Time.
After Normal Time ends you can still solve problems until the contest ends. This period is called Extra Time, and points gained in Extra Time are the second way to order contestants. Thus points gained in Extra Time are used to rank participants that have the same number of points gained in Normal Time.
If a pair of contestants have the same number of points gained in Normal Time and the same number of points gained in Extra Time, they will be ordered according to the time (in seconds) of the last submission which gave them an improved positive score. For each programming task, we will consider only the best submission (or if there are many submissions which are equally correct, the earliest). For logic puzzles, if you submit new answers in Extra Time, whatever score you would have got is over-written by your new submission, and those points are changed into Extra Time points.
In other words, it's always safe to submit a new answer for programming tasks (you can only improve your situation). It is not always safe to do that for logic puzzles – consider carefully whether or not you want to do that.
The problems will be relativly easy but, I hope, they will be interesting, as will be the contest format.
We will be greatful for all community members who help us in testing.
With best regards, Ivan.
Its gonna be intresting! I think ;)
The problems will be very easy, it is just a testing round :)
Where did idea come from?
Where's the special link?
I think it will be shown after beginning of the contest)
Sounds interesting! But why a logic puzzle...?
Is it rated?
"Today (16:00 UTC) we want you to take part in testing and unrated round with unussual scoring system."
Where's the special link?
I can't see the problems!
where we can take part in contest?
It seems to be starting soon. $10 says that A+B problem will appear. Good Luck.
You Loos.. Send me the $10.. :D
End of registration. Good luck all!
The "Alpha Round 2 rules:" page has no scrollbar, and is scrollable only by arrows (and not scrollable by mouse wheel). Firefox 25.0.1.
I had the same problem on all tabs except one. Google Chrome 33.0.1750.154
Can you give me screenshot, plz?
http://i.imgur.com/aJIOrJb.png
Great, thanks! Can you also attach logs from developer console written while loading the page? Press Ctrl+Shift+J and click to open the tab.
Can you give me screenshot, plz?
I'd prefer opening all problem pages once the contest begins (since the network connection to Codeforces is pretty slow), but opening new tabs caused the resulting tab has no scrollbar in this contest.
Reproduction:
More details:
I got (for example) url "https://ctc.codeforces.com/contest/7/my" by opening new tabs directly, but what I really want is "http://mirror.codeforces.com/alpha7#/contest/7/my".
In short, opening new tabs will break out from
<iframe>
.To MikeMirzayanov: I mean this problem.
Why I have 0 points for problem B? It was solved in main time and assuming my answer is correct, points in monitor should be 10
It was the same bug for me, I submitted answers for some logic puzzle, and they disappeared (or haven't been saved, I don't know), as I noticed later.
But my answer is not disappeared, and my submission is in submissions list. But points at monitor are 0 (and on mouse hover, "Points in case of all given answers are correct" is shown).
Can you describe your case in details?
So, it was problem "Permutation Game", I wanted to submit Test 2 first, but submitted it as Test 1. I noticed that and then resubmitted Test 1 with a different answer, and then submitted Test 2 and Test 3 answers. While solving, I didn't reload the problem page. I closed the problem, and after a while I noticed that I only had 3 points for that problem. I opened it, and there was only Test 1 submission (with my Test 2 answer), so the state before I resubmitted Test 1. Then I submitted the answers again.
Problem B is logic puzzle, it will be checked after the contest.
Thanks, we will investigate it. Do you see your answer if open problem statement?
Yes, I see, and also I can see my submission in the list.
Don't know if the same for others users, but each time I try to change the page on standings, I get the "all your bugs are belong to me" page.
DEL i scrolled up and saw
When you access the scoreboard BUT not on the page you are ON. (For ex, your standing is in 3rd page(41-60), and you tried to access the 1st page, a error message come. (The one that says that all bug belongs to me)
It will be fixed, thanks.
My first submission is at 01:00:06 & my last submission is at 01:28:46 Why my last submission is in extra time?
You started the contests before your first submission. It is when you press "Start contest" button.
Lets share our answers to logic problems.
Mine answers are:
A) 366; 800
B) 5
C) BABA; CBABBA
D) CADB; EBDFAC; CEFIBHADG
E) 8; 23
A:367, 792 B:11 C:BABA, CBABBCC D:CADB, EBDFAC, CEFIBHADG E:8, 23 :D
I have bad news for one of you : )
who?
YOU ,I think ...
I don't know, but you can't both be right, so for one of you.
I am sure that your answer for C is incorrect.
((3+1)*2+3)*2*2+1+1==46
Yes
Yeah, I got the same. :)
Same except A) 366; 792 Edit: Oh... Stupid me
In A2 you should output maximum number of pages. Pages from 792 to 800 do not have any ones in their decimal representation, so I guess 800 is correct.
again yes
Mine are same.
In program 3, I got partial result, I don't know what did I miss. Can you look at my code and tell me what's wrong. Solution
We can't access to solutions for moments, but I had myself partial result for one reason:
I didn't took in account the fact that two country having the same amount of medals had the same ranking.
For sample:
1 GER 2 1 1
1 RUS 2 1 1
and not
1 GER 2 1 1
2 RUS 2 1 1
Interestingly, ABBABC also works, and is a reverse of your answer.
Does it?
((3+3)*2*2+3)*2+1=55
Oh damn. It works if we start with 2, not 3.
It is not a bug, but the right side of the contest page hid when a window size was small (In the same window size, it doesn't hide at usual contests).
"A solution is evaluated on a fixed set of tests right after it is submitted. For each passed test, a contestant will get a fixed amount of points. The sum of points for all passed tests is the total points received by the solution."
Let me see if I got this right...
A contestant submits a solution, and instantly gets feedback reporting how many points the solution earned. And a solution can get 80% of the total points of a problem, for example. Did I understand right?
If I did, I must say that I absolutely LOVE the system.
Nice contest, I want more like this. Positive:
— love running algorithms on brain+paper instead of computer
— very fast + no coding required
— new & unusual
duration of important part 30 minutes
easy coding problems
Negative:
— participants can share their answers to logical problems privately, without any chances from Jury to notice it
— multiple accounts allow to move solution timings from second to first time limit
Best of luck, will be waiting for next one.
Are there any plans for more upcoming contests like this one? I really want to take part in contests with this system.