### Блог пользователя hmehta

Автор hmehta, история, 4 месяца назад, ,

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.

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)

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 » 4 месяца назад, # |   +5 When I enter Web Arena it says "Completing login... One moment please..."But It didn't open from half an hour
•  » » 4 месяца назад, # ^ |   -8 Web arena is in its beta version — please try and use the Applet. This guide will help you set up the applet — https://drive.google.com/open?id=1gVJZxhWYMuUNx3PfSSTkkk-b9AeJkL4j
 » 4 месяца назад, # |   0 Just a reminder, 1 hour to go.
 » 4 месяца назад, # |   0 What is the difference between Round 2B and Fun Round 2b ?
•  » » 4 месяца назад, # ^ |   0 Round2B is By Invitation only For Participants who qualify to itFun Round 2b is rated For everyone and everyone can participate in it
 » 4 месяца назад, # |   +74 Cannot enter the room.
•  » » 4 месяца назад, # ^ |   +6 I can't also enter the room
•  » » 4 месяца назад, # ^ |   +44 I can't even go into the arena
 » 4 месяца назад, # | ← Rev. 2 →   +43 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 ?
•  » » 4 месяца назад, # ^ |   +28 I also can´t. I tried restarting applet and now it´s frozen at login screen.
•  » » » 4 месяца назад, # ^ | ← Rev. 2 →   +16 Same here.Topcoder screwed it up again, no surprise.
•  » » » » 4 месяца назад, # ^ |   -10 Now it´s saying something super weird: Your JRE does not support AES-128, login not allowed.
 » 4 месяца назад, # |   +14 Cannot enter my room
 » 4 месяца назад, # |   +21 cannot login
 » 4 месяца назад, # |   +34 Thought of logging off and logging back in. Can't log in now. I am using the java applet
•  » » 4 месяца назад, # ^ |   +10 I got logged off just going to another room.
 » 4 месяца назад, # |   +14 Now Im not even able to login
 » 4 месяца назад, # |   +5 I can't login to Applet
 » 4 месяца назад, # |   +77 okay let's just watch world cup
•  » » 4 месяца назад, # ^ |   +7 That's what I told them before — http://codeforces.com/blog/entry/59873?locale=en.They didn't listen and here we go!
•  » » 4 месяца назад, # ^ |   +44 So maybe Admin is also watching world cup :D
 » 4 месяца назад, # |   +34 Seems like the server is offline. Web arena says "Login time out. Please try again at later time" when trying to log in.
 » 4 месяца назад, # |   +43 My JRE does not support some stuff it seems.
•  » » 4 месяца назад, # ^ |   +20 Same here
 » 4 месяца назад, # |   +10 Cannot login using the applet
 » 4 месяца назад, # |   +18 Showing incorrect username and password while I am pretty sure the details are correct.
 » 4 месяца назад, # |   +38 Now in Applet It says Your JRE Doesn't Support AES-128.login not allowed
•  » » 4 месяца назад, # ^ |   +18 Restarting the applet helps with AES issue.
•  » » » 4 месяца назад, # ^ |   +8 I restarted it But Still can't login
 » 4 месяца назад, # |   +46 Can't log in. I even take one day off to participate this one. Can you guys don't schedule on weekday next time?
 » 4 месяца назад, # |   0 Can't login, getting error "Your JRE does not support AES-128, login not allowed."
•  » » 4 месяца назад, # ^ |   0 Try Restarting Applet For this issue
 » 4 месяца назад, # |   +10 I wanted to compete in the parallel round. Then I forgot... and I'm glad I did, I was spared some disappointment.
•  » » 4 месяца назад, # ^ |   +10 Sorry! We are looking into it! Will revert asap!
•  » » » 4 месяца назад, # ^ |   0 Can you just cancel this round and schedule it some other day respecting the World Cup schedule?
•  » » » » 4 месяца назад, # ^ |   -7 And 1:0!
•  » » » » » 4 месяца назад, # ^ |   -10 GO RUSSIA!!!
•  » » » 4 месяца назад, # ^ |   0 Any official announcement maybe? Some of us need to go to work. And watch world cup there on a big screen :)
•  » » » 4 месяца назад, # ^ |   +5 So, you will reschedule the contest on another day? or it'll be today?
 » 4 месяца назад, # | ← Rev. 2 →   +15 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 :'(
•  » » 4 месяца назад, # ^ |   +1 Also can't login
 » 4 месяца назад, # |   +14 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)
•  » » 4 месяца назад, # ^ |   +5 Or maybe the users who receives the max number of upvotes here on codeforces by commenting various issues they are facing with topcoder.
 » 4 месяца назад, # |   0 Now it says request time out
 » 4 месяца назад, # |   0 Can't enter using applet or the web arena!!!
 » 4 месяца назад, # |   +116 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.
•  » » 4 месяца назад, # ^ |   +5 I think it's safe to assume this match won't happen today. I don't think topcoder can achieve: Fix server. Inform all participates new schedule today and make sure all participates get the message before match start. Doesn't have schedule collision with participates. Wasted one of my vacation.
•  » » » 4 месяца назад, # ^ |   +8 Return back, it's working again!!1!
•  » » » » 4 месяца назад, # ^ |   +1 Well, too late :(
 » 4 месяца назад, # |   -14 login page is showing "invalid username or password". 20 min passed and still i am unable to login.
•  » » 4 месяца назад, # ^ | ← Rev. 2 →   +33 it seems the first problem is to break the 128 AES :)
•  » » » 4 месяца назад, # ^ |   0 TopCoder is the new izhal
 » 4 месяца назад, # |   +21 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 :(
 » 4 месяца назад, # |   0 Still facing server issue Can't Login both in arena and applet TC should adjust the time after fixing server issues
 » 4 месяца назад, # |   0 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.
 » 4 месяца назад, # |   +5 Official announcement please?!
 » 4 месяца назад, # |   +8 2018 TCO Round 2B Forumhttp://apps.topcoder.com/forums/?module=ThreadList&forumID=628951
 » 4 месяца назад, # |   +9 Finally Applet Opened and Contest Will start in 15 minutes
 » 4 месяца назад, # |   +13 Announcement from the Arena: "Welcome back everyone, we'll be starting in approximately 15 minutes"( I managed to login successfully )
 » 4 месяца назад, # |   0 Finally the applet works now! whew!
 » 4 месяца назад, # |   0 Contest starts in 9 mins
 » 4 месяца назад, # |   0 Finally ready to start!!
 » 4 месяца назад, # |   0 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.
•  » » 4 месяца назад, # ^ |   0
•  » » » 4 месяца назад, # ^ |   0 What's your TC handle?
•  » » » » 4 месяца назад, # ^ |   0 It worked fine after a reload. Sorry for the trouble.
•  » » 4 месяца назад, # ^ |   +5 It took about a minute to load the 2 button and another minute to load the Enter button for me
•  » » 4 месяца назад, # ^ |   0 Try Applet
•  » » » 4 месяца назад, # ^ |   +8 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/
 » 4 месяца назад, # | ← Rev. 2 →   +127 I ranked really high in the room:
 » 4 месяца назад, # |   0 When will you send the t-shirts?
 » 4 месяца назад, # |   +46 My solution on easy was simple O(n). SpoilerPrint 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! SpoilerWLOG (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!
•  » » 4 месяца назад, # ^ |   +10 I see hard is quite straightforward! Just match small interval around each element and do some kind of minimum cost matching.
•  » » » 4 месяца назад, # ^ | ← Rev. 2 →   +8 For hard, I did these observations : Spoiler Let R(i, j) = (ij is square), then R(i, j) is an equivalence relationship, and you should match each number to each equivalence class. For each number, you only have to consider at most n closest classes, as you will find something to match there. Then you have a bipartite graph with O(n2) vertices and edges.After then, as you said, it's a min cost matching.
 » 4 месяца назад, # |   +6 So it was not rescheduled? just postponed 45min? LOLIt 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.
•  » » 4 месяца назад, # ^ |   -12 If you want note something for yourself don't write it here. Did you even read the problems from this round ?
•  » » » 4 месяца назад, # ^ |   +26 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)
•  » » » » 4 месяца назад, # ^ |   +6 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."
•  » » » » » 4 месяца назад, # ^ |   0 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 :)
•  » » » » » » 4 месяца назад, # ^ |   0 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.
•  » » » » 4 месяца назад, # ^ |   +11 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.
 » 4 месяца назад, # |   +21 Ratings for the 2B round are calculated, but those for the parallel srm are not. Is it ok?