TCO18 Algorithm Round 2B and Parallel Rated SRM
TCO18 Algorithm Round 2B and Parallel Rated SRM is scheduled to start at 11:00 UTC -4 on June 14, 2018. You will be able to register for the SRM in the Arena or Applet 4 hours prior to the start of the match. Registration closes 5 minutes before the match begins, so make sure that you are all ready to go.
Click here to see what time it starts in your area.
Algorithm Round 2 Qualified Competitors: https://tco18.topcoder.com/algorithm/online-round-results/ and https://tco18.topcoder.com/algorithm/byes/
If you are participating from web arena — You can switch to the parallel rated fun round in the mentioned way:
Don’t know how to compete in Topcoder SRMs?
Check out this guide to successfully compete in an algorithm match.
You can compete using:
- Topcoder Web Arena(Beta) - Please watch this video for step by step guide.
- Topcoder Java Applet - You can refer to this guide here to set up the applet. (Note that those who have Java 8 installed on their machine will see a security issue — You will have to add Topcoder in security exceptions in Java Control Panel. Please refer to the details in the guide here)
When I enter Web Arena it says "Completing login... One moment please..."
But It didn't open from half an hour
Just a reminder, 1 hour to go.
What is the difference between Round 2B and Fun Round 2b ?
Round2B is By Invitation only For Participants who qualify to it
Fun Round 2b is rated For everyone and everyone can participate in it
Cannot enter the room.
I can't also enter the room
I can't even go into the arena
I registered for the contest. But I am unable to find the Enter button. Is everything right with everyone else?
PS: I am using arena.
Is someone in applet also facing the problem ?
I also can´t. I tried restarting applet and now it´s frozen at login screen.
Same here.
Topcoder screwed it up again, no surprise.
Now it´s saying something super weird: Your JRE does not support AES-128, login not allowed.
Cannot enter my room
cannot login
Thought of logging off and logging back in. Can't log in now. I am using the java applet
I got logged off just going to another room.
Now Im not even able to login
I can't login to Applet
okay let's just watch world cup
That's what I told them before — http://codeforces.com/blog/entry/59873?locale=en.
They didn't listen and here we go!
So maybe Admin is also watching world cup :D
Seems like the server is offline. Web arena says "Login time out. Please try again at later time" when trying to log in.
My JRE does not support some stuff it seems.
Same here
Cannot login using the applet
Showing incorrect username and password while I am pretty sure the details are correct.
Now in Applet It says Your JRE Doesn't Support AES-128.login not allowed
Restarting the applet helps with AES issue.
I restarted it But Still can't login
Can't log in. I even take one day off to participate this one. Can you guys don't schedule on weekday next time?
Can't login, getting error "Your JRE does not support AES-128, login not allowed."
Try Restarting Applet For this issue
I wanted to compete in the parallel round. Then I forgot... and I'm glad I did, I was spared some disappointment.
Sorry! We are looking into it! Will revert asap!
Can you just cancel this round and schedule it some other day respecting the World Cup schedule?
And 1:0!
GO RUSSIA!!!
Any official announcement maybe? Some of us need to go to work. And watch world cup there on a big screen :)
So, you will reschedule the contest on another day? or it'll be today?
Cannot login!!! says Time-out on every server! is something wrong?!
UPD: now it says invalid login on the arena alternatively with time-out!!
I thought TC was stable at least in contest like these :'(
Also can't login
Looks like they will rate this round based on the number of login attempts ;) Those who tried the most times will proceed to Round 3 (just kidding)
Or maybe the users who receives the max number of upvotes here on codeforces by commenting various issues they are facing with topcoder.
Now it says request time out
Can't enter using applet or the web arena!!!
Is there any chance that this round will happen today, or are there already some contestants who saw the problems?
I'd like to know if I should wait, or return to work.
I think it's safe to assume this match won't happen today. I don't think topcoder can achieve:
Wasted one of my vacation.
Return back, it's working again!!1!
Well, too late :(
login page is showing "invalid username or password". 20 min passed and still i am unable to login.
it seems the first problem is to break the 128 AES :)
TopCoder is the new izhal
Please update us with what to do now!
This is worrying, we have other things to attend to other than retrying the server afraid at some point it might come back :(
Still facing server issue
Can't Login both in arena and applet
TC should adjust the time after fixing server issues
Why Topcoder arena sucks!! I have tried to do SRM on it for last 2 SRMs and I wasn't even able to log in. The case is same today as well. I don't know what sci-fi mission Topcoder people are on because they haven't been able to build a proper lag free website for the last couple of years.
Official announcement please?!
2018 TCO Round 2B Forum
http://apps.topcoder.com/forums/?module=ThreadList&forumID=628951
Finally Applet Opened and Contest Will start in 15 minutes
Announcement from the Arena: "Welcome back everyone, we'll be starting in approximately 15 minutes"
( I managed to login successfully )
Finally the applet works now! whew!
Contest starts in 9 mins
Finally ready to start!!
Is anyone else having issues with the fun round? I registered for the fun round (from the web version, not from the applet) and now I can't even see the fun round, let alone enter the rooms.
hmehta
What's your TC handle?
It worked fine after a reload. Sorry for the trouble.
It took about a minute to load the
2button and another minute to load theEnterbutton for meTry Applet
Sorry for the issues you all faced! We are going to discuss internally what transpired and figure out next steps. Apologies for this issue.
Here are the round editorials: https://www.topcoder.com/blog/2018-tco-algorithm-round-2b-editorials/
I ranked really high in the room:
When will you send the t-shirts?
My solution on easy was simple O(n).
Print the lower convex hull of set (i, Si) for 0 ≤ i ≤ n, when
My medium solution was similar to the model one, but jihoon's solution can be made into O(nlgn). Neat!
WLOG (max of values with color R) <= (max of values with color G) <= (max of values with color B).
(max of values with color B) is obviously the maximum of all. Let's fix the upper bound (max of values with color G). Then we have a subset of values that must be color B, and a number of segments that is divided by B.
In a picture, it's like this :
...B..B...B...B..BThere is five B, and five segments of length 3, 2, 3, 3, 2.
For segments of odd length, we can always color it with only G and Bs. Otherwise, we only need one Rs to fill the segment. This should be a minimum value — thus, you can use std::set to maintain B and the segments, and tournament trees to handle range minimum queries.
And the problems were great. Thanks Lewin!
I see hard is quite straightforward! Just match small interval around each element and do some kind of minimum cost matching.
For hard, I did these observations :
Then you have a bipartite graph with O(n2) vertices and edges.
After then, as you said, it's a min cost matching.
So it was not rescheduled? just postponed 45min? LOL
It was scheduled for a working day, so I've even istalled this crappy jnlp with plugins at my computer at work (arena is so shitty that this is not even an option). The applet was not working for 30 min so I've left and go back to work, but the round was not rescheduled?
Note to myslef: only atcoder has rounds on saturdays with awesome problems. So don't waste your time on other sites especially topcoder.
If you want note something for yourself don't write it here. Did you even read the problems from this round ?
The applet/arena are piles of garbage regardless of the quality of the problems and that can't be denied. When there is absolutely nobody who doesn't dislike the platform, you can note things for others as well. It was absurd that they still kept the round and many wouldn't even know about it. The only good thing about the topcoder is the quality of problems (sometimes)
The good news are that apparently there's going to be round 2C.
Quote from the email from Topcoder admin:
"Our next SRM on June 26 at 7:00 UTC -4 will have a parallel TCO Round 2C. This round will open to all round 1 advancers who have yet to qualify for round 3. The TCO18 website and calendar will be updated with this information as soon as possible."
Does it mean that all results of 2A and 2B are disclaimed? And now will be one round for all and 400 best will proceed?
This is such an obscure email, like political statement :)
This round will open to all round 1 advancers who have yet to qualify for round 3.
So, I think that it's just one more possibility to advance for round 3 and it shouldn't affect participants, which were already advanced through round 2A or 2B.
It's clear situation about applet/arena, also it's clear that there were no solution about rescheduling round or not, because both decision will be good only for some part. I wrote that to disagree about quality of the problems from topcoder, shit happened, but they quite always very good, so please don't mix the issues and the quality of the problems it's clear, that peoples write topcoder not to enjoy applet/arena.
Ratings for the 2B round are calculated, but those for the parallel srm are not. Is it ok?