Egor's blog

By Egor, history, 3 weeks ago, In English,

Hello!

World Finals is near us once again and I am trying to collect data about participants once again. This year we are able to collect your Codeforces and TopCoder handles through icpc.baylor.edu profiles. If you'd log in into the site and go Profile -> Social Media you'd be able to enter your handles. I would kindly request everyone to do just that.

I'll publish data I gathered in a couple of days, if you notice any errors I'd appreciate if you post about them either in comments to this post or in personal messages

UPD: Preliminary data

Last update: 22.05 10:45 MT

Data will no longer be pulled from Baylor database, if you want to update something — fire me personal message

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By Egor, history, 12 months ago, In English,

Dear WF contestants.

In order to correctly get your data for ICPC Live translation I kindly ask to update your codeforces profile name to the same name listed on MyICPC in your profile. If your TC handle differs from Codeforces one, I would be glad if you send me your TC handle/put it in comments section

Good luck in Phuket

UPD: here's pretty raw data I accumulated so far. If you want to add your handles for TC/CF or correct any error feel free to comment this post/send me message

UPD2: More human readable form is now available (note, link changed) and includes all latest changes as well as data on much more personal competitions

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By Egor, history, 21 month(s) ago, In English,

Contest is finished, you may discuss problems

My screencast

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By Egor, history, 23 months ago, In English,

I would really appreciate any new ideas of what new features to add

I would also appreciate donations: Yandex.Money, PayPal

4.1.8

  • All parsers are up to date
  • GCJ and Kattis are now only parsable from Chrome extension

4.1.5

  • Added parsing for AtCoder and CSAcademy
  • Fixed parsing for HackerRank
  • Fixed enums in switches

4.1.3

  • Various fixes for code generation

4.1.2

  • Cojac version update. If you use Cojac for your own configurations update agent parameters as follows:
-Cints -Clongs -Ccasts -Cmath
  • Cleanup
  • Switched to Java 1.8
  • Timus parser fix
  • Kattis parser fix
  • Include all Kattis sites

4.1.1

HackerEarth support


4.0.11

Fixed issue with using method as functional interface


4.0.10

Fix for USACO parsing. Currently on beta channel

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By Egor, 2 years ago, In English,

We would appreciate all and any feedback. You can find full footage of this year ICPC Live here. You can leave comments here or contact me through PM.

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By Egor, 2 years ago, In English,

image

Follow World Finals Live on Tumblr

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By Egor, 2 years ago, In English,

Follow live updates on tumblr

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By Egor, 2 years ago, In English,

image

The last but not the least interesting team is ITMO University's team 1.

ITMO has most championship titles, 5, out of 19 finals they participated in. They've got 10 Gold medals total, 1 Silver and 1 Bronze.

This year team consist of 2 Bronze Medalist from 2014, Borys and Artem, and World Champion from 2013, Gennady. Team is on first place in OpenCup Standings, won numerous contest this year and universally regarded as favorite to win World Finals, are coached by Andrey Stankevich.

Gennady Korotkevich (TC: 3794, CF: 3407) is one of the most honored coders ever. ACM ICPC Champion in 2013, TCO Winner in 2014, GCJ Winner in 2014, IOI Gold Medalist for a whooping 6 years (2007-2012), that's in addition to SIlver (2006) and many more achievements like Facebook Hacker Cup wins.

Borys Minaiev (TC: 2760, CF: 2776) won Bronze in last year Finals, was TopCoder Open Semifinalist in 2014, Facebook Hacker Cup Finalsit in 2015 and got 3rd place in Kotlin Challenge in 2014.

Artem Vasilyev (TC: 2612, CF: 2545) got World Finals Bronze in 2014 and was KROK Finalist in 2013.

It would be really unlikely for ITMO not to win Gold Medals, I have their chances at 99%. I think their chances to win is about 75%.

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By Egor, 2 years ago, In English,

image

This year my alma mater is represented by team Moscow SU Tapirs.

Moscow State University has a long history at World Finals. 19 appearences, 4 Gold medals (all of them — 2nd places), 1 Silver and 7 Bronzes. Moscow SU is also 2 times champions of Europe.

Tapirs team came 2nd last year in Yekaterinburg in intense battle with St. Petersburg State University. In NEERC 2014 they came second as well, while losing to ITMO University team only on penalty time. Moscow SU is currently 3rd in OpenCup standings with one stage win. They had bested ITMO team on 2 more stages. Anton Pankratiev is team coach.

Gleb Evstropov (TC: 2405, CF: GlebsHP 2622) got 3rd in this year Facebook Hacker Cup. He also won Silver medal in IOI 2010 and was Russian Code Cup finalist last year.

Victor Omelyanenko (TC: 2531, CF: TeaPot 2687) got 2nd place on ACM ICPC World Finals last year with Gleb and Mikhail.

Mikhail Pyaderkin (TC: 2428, CF: _meshanya_ 2550) won IOI Gold in 2010 as well as placed 2nd in Vekua Cup personal contest in 2012.

image

This team got only stronger since last year. Their chance to win Gold are at least 80%, while they had shoy at Championship as well, with about 15% chance.

Last team to look at will be ITMO University team.

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By Egor, 2 years ago, In English,

image

Today let’s talk about The University of Tokyo team !#$%&()*+-./:;<=>?@[]^_`{|}~. University of Tokyo has long history of World Finals participations, this would be 13th time. They won one Gold, one Silver and 2 Bronzes, and 2 members of this year team won Gold in 2013.

They won regional contests in Tokyo and Kuala Lumpur, only team in Asia this year with such achievement. Team is currently on 17th place in OpenCup standings, although they skipped several stages and not always had optimal line-up. Tomoyuki Kaneko coaching them.

Kensuke Imanishi (TC: 2625, CF: wrong 2298) won 2 Silver medals in IOI (2010 and 2011) and was GCJ Finalist in 2013, that's beside his Gold in ACM ICPC Finals.

Shogo Murai (TC: 3017, CF: semiexp 2507) has 3 IOI Golds (2010-2012) and target on TopCoder to boot.

Makoto Soejima (TC: 3468, CF: rng_58 2849) is really a legend. He is one of only 4 people to win both GCJ (2011) and TCO (2010, 2011) and currently is TopCoder admin. Beside that he has Silver in IOI (2008, 2009) and Gold in World Finals. image

While this team has really strong line up it's results are inconsistent. I'd give them 70% for Gold and about 5% to win.

Tomorrow we will look at team from my alma mater, Moscow State University.

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By Egor, 2 years ago, In English,

image

Second team to look at is University of Zagreb

Once again, this third appearance of Zagreb’s team at World Finals and both in 2008 and last year teams got Silver medals. Stjepan Glavina and Ivan Katanic both participated in 2014 Finals.

Team decisively won CERC 2014 with 10 solved problems to second place’s 8. They participated in 3 stages of OpenCup, not very successfully though, and with 15 points are currently in 73rd place. Team also finished 5th in elimination round of Deadline 24. Zagreb’s coach is Kresimir Malnar.

Stjepan Glavina (TC: 2620, CF: 2509) won Gold in IOI 2009 and Silver in 2010.

Ivan Katanic (TC: 2704, CF: 2613) also has 2 IOI medals — Gold in 2011 and Silver in 2010.

Gustav Matula (TC: 2179, CF: 2160) had got his IOI Gold in 2011.

This team as about on par with Lviv, so I predict about 60% chance to get Gold medals and 1% for win.

Check back tomorrow as we’d look at University of Tokyo team.

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By Egor, 2 years ago, In English,

image

Hello, this is Egor. Today we are starting previewing some teams from ACM ICPC World Finals in Marrakech that, by my opinion, have most chances to win gold medals. First to go is Lviv National University team LNU Penguins.

Some trivia: Lviv NU participated just 2 times, but got gold one of those times, in 2008. One of participants of that team, Vasyl Biletsky, is current team's coach (but we should note that he actually was his own team's coach in 2008 as well).

This year team qualified to World Finals as winners of SEERC. They are currently 11th in OpenCup standings (do note, however, that there are many teams in that standing that are not ICPC eligible for one reason or another).

Roman Bilyi (TC: 2513, CF: 2672) participated in Russian Code Cup Finals in 2014 and won Bronze in Snarknews Winter Series 2015

Vitaliy Herasymiv (TC: 2206, CF: 2356) won Silver in IOI 2012

Bohdan Pryshchenko (TC: 2269, CF: 2348) won Gold in Snarknews Winter Series this year and Silver in Summer Series last year.

image

I believe this team has decent chance to clench gold, about 60%, while their chances to win are slim, about 1% or so.

Stay tuned for tomorrow as we will look at our next team from University of Zagreb!

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By Egor, 2 years ago, In Russian,

Привет!

Мы тут хотим во время resort day провести отыгрыш синхрона "Кубок Ичеришехер. Третий этап."

У нас пока еще нет ведущего (ищем, но если кто-то хочет им стать — пишите). Если хотите сыграть — тоже пишите. Если нету команды — тоже пишите, вдруг прям тут и найдете

UPD: ведущий нашелся

UPD2: заявка принята, самое время записываться

UPD3: турнир состоится уже скоро. Когда будут известны окончательно место и время — я добавлю их в этот пост

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By Egor, 2 years ago, In English,

Final scoreboard

Introduction

Arrival

History

Some photos from contest and closing ceremony

Interview with Bayan CEO Ali Ghadiri and some photos from the event will be published tomorrow

Places 10-15 received bronze medals

Top 3 receive gold medals. Silver medals for next several places: 4. Adrian Budau 5. Peyman Jabbarzade 6. Pooya Zafar. Places 7-9 also received silver medals, unfortunately I could not keep up with announcers

Nikola Djokic is third!

Ali Haghani is second. Congratulations!

And the winner is Evgenii Kapun aka eatmore

Winners will be announced shortly!

Speeches, videos and performances — all the usual things for closing ceremony.

Closing ceremony is underway. We'll know winners shortly

Scoreboard is frozen

Place Name Country A B C D E F G H Score
1 Evgenii Kapun RUS + + + + + 5119
2 Ali Haghani IRI + + + -3 2237
3 Peyman Jabbarzade IRI + +1 +1 2115
4 Nikola Djokic SRB + + + 2038
5 Pooya Zafar IRI + + + 1933
6 Adrian Budau ROM +3 + +2 1906
Solved 52/97 35/71 3/15 1/2 2/2 0/0 2/4 1/7

3:01 Contest is over. Congratulations to all finalists and good job

2:32 Last half hour is upon us which mean no more updates to scoreboard. Come back tomorrow for closing ceremony and winners announcement

2:22 Eugene solved G as well. Would it be enough to clench the title?

2:15 Meanwhile Ali Haghani continues to try to solve problem H

2:05 Problem D is penultimate problem to be solved thanks to Peyman Jabbarzade. Less than an hour left in the contest, scoreboard will be frozed for the last 30 minutes

1:53 Problem G is solved as well. Only problems D and F are unsolved (though I solved them both during test run)

1:39 And finally he is successful. Meanwhile Ali Haghani tries to solve H. No luck as of yet

1:34 eatmore still debugging E — one of his asserts fails

1:22 eatmore debugging samples on E. This is also the problem I had not solved during test round (and still don't know how to solve)

1:18 No much happening near the top at the moment

1:00 One more problem is "opened" — problem C. Kudos to Ali Haghani

0:50 39 finalists solved first problems while 12 — second

0:40 During test run I solved 6 problems, but H was not one of them (I solved it within half hour afterwards though)

0:30 Top 5 solved 2 problems

0:23 A lot of correct submissions on problem A, problems B and H are also "opened"

0:10 Eryx tries to tackle first problem as well, but not successful yet

0:08 But we have our first Accepted. Congratulations to Ali

0:06 Most participants just read problem statements (there are paper ones), not yet trying to code anything

0:01 Contest is started

-0:17 Contest likely to start in 17 minutes

-?:?? Test contest is still underway

-?:?? Contest is delayed. Currently short test round is conducted. Finalists set up their equipment

-0:13 Last preparations are made. Participants waiting in the hotel lobby

-0:52 Participants had finished their breakfast and will shortly arrive to contest area

-3:00 Finals are supposed to start in 3 hours. Stay tuned

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By Egor, 2 years ago, In English,

This year is 3rd edition of Bayan Contest.

Inaugural contest took place in 2011. About 800 university and high school students from all Iran tried to qualify for the finals through 2 online rounds and best 30 of them participated in the finals at Bayan offices in Tehran. Seyed Hamed Valizadeh won university stundents contest while Saeed Ilchi won high school part.

Next time Bayan decided to hold international contest. Codeforces was used to select international participants while Bayan's own system was used for selecting Iranian finalists as well as for the final itself. This time 1286 participants from 54 countries and 1728 from Iran tried to qualify and 8 international and 16 local finalists arrived to Parsian Azadi Hotel on February 16th 2013 in order to decide who is the best. 0O0o00OO0Oo0o0Oo won the contest, cerealguy was second and I took the third place

This year 10266 participants from 103 countries tried to qualify. Tomorrow 60 finalists will once again clench for the title in Parsian Azadi Hotel conference room. Who will be the winner? Post your favorite in the comments.

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By Egor, 2 years ago, In English,

Yesterday we arrived to Tehran Imam Khomeini International Airport.

eatmore was on my plane from Moscow, while we also met ra16bit in the airport who arrived from Minsk.

After rather long process of aquiring visa and going through passport control (we arrived at 3:25 AM, but only got in taxi at 6:20) we got to the Parsian Evin Hotel where participants would live. Contest itself would take place in nearby Parsian Azadin Hotel.

After sleepless night I slept for most of the day.

Stay tuned for updates as today is excursions day.

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By Egor, 2 years ago, In English,

Hi there!

As you probably know this is the second time Bayan opens it's programming competition to international coders. 2 years ago I participated myself and ended up taking 3rd place. This time around I'll be your blogger.

In this first post I want to give you some useful tips and links to know more about Iran and, if you won trip to Iran, what would you need to know.

Iran is a country with very rich history. Through the ages it participated in Greco-Persian wars, accepted Islam, was under Shah rule and now known as Islamic Republic of Iran since revolution in 1979.

Tehran, capital of Iran, is modern city, but with a lot of historic places throughout the city, like palaces of last Iranian Shahs, which is now museum complex or Grand Bazaar, both of which contestants visited 2 years ago.

As for food, get ready for some tasteful Iranian cuisine. I'd especially recommend lamb kebab.

Now, if you want to use your usual websites like Facebook while in Iran I'd recommend to take care of VPN service in advance. There are many options around Internet.

Finally if you want to stay online while on the go in Tehran I'd recommend visit this page about SIM-cards and data plans in Iran (refer to comment section).

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By Egor, 2 years ago, In English,

Just fyi. Migration ended

CHelper new home YAAL new home

You are welcome to contribute in either

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By Egor, 2 years ago, translation, In English,

Hi!

I can't solve this зproblem. My code:


#include <iostream> using namespace std; int main() { int a, b; cin >> a >> b; int ans = 0; for (int i = 0; i < a; i++) ans++; for (int i = 0; i < b; i++) ans++; cout << ans << endl; return 0; }

Please help

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By Egor, 3 years ago, In Russian,

На сайте TopCoder сейчас идут выборы Community Advisory Board. Почитать о том, что это такое, можно тут

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By Egor, 3 years ago, In English,

Hello from Berlin!

Get ready for some action as participants are ready to battle for Grand Prize of 300000 russian roubles and coveted title of Yandex.Algorithm champion

Stay tuned for live commentaries

If you have any questions about the competition feel free to ask. Competition starts at 11:30 CET, about an hour from now. Currently participants set up their PCs

-0:33 — We have quite tough field this year including ACM ICPC World Champions, TCO, GCJ and IOI winners. snarknews had provided some info on finalists here

-0:10 — Contest is delayed for 10 minutes

-0:09 — You can follow live results here

-0:05 — Currently contest area is filled with several journalists and cameramen

0:01 — Contest had been started, participants reading problems atm

0:11 — Petr and cerealguy

0:16 — there are several submits on D, some blind and some open. and 1 submit on both B and E, blind

0:19 — 0O0o00OO0Oo0o0Oo is gettings TLEs on problem D, seems like map just do not cut it

0:23 — First submit on A. Also second one on B. All submits not on D are blind now

0:24 — marek.cygan is first one to submit 2 problems and currently in the lead

0:26 — Problem A is a tricky one — sometimes you need to add something for stack before removing

0:30 — tourist and eatmore

0:32 — During test run I solved A, B and D during the contest and C a couple of minutes later, though I have seen A and B before

0:33 — Currently marek.cygan, pperm, s-quark and LayCurse are in lead with 2, while usual favorites have only one problem under their belt

0:36 — Some more subbmits, most of participants with 2 solved D and either B or E, though there are also one blind submission on A

0:42 — Merkurev may spend a lot of time on A as currently he have the mistake I mentioned. To his defence authors originaly made the very same mistake

0:44 — A lot of photos made by some professionals

0:46 — Contest almost reached its equator, and we have out first participant with 3 problems — s-quark. He solved all the usual suspects — B, D and E

0:50 — vepifanov joined him, though remeber — as Yandex empoyee he participates out of competition

0:51 — And now we have someone we sure solved 3 problems — 0O0o00OO0Oo0o0Oo

1:00 — Both Petr and tourist are now in group of people who solved 3

1:01 — eatmore is actually quite close to solve A — he only needs to understand that sometimes it is good to make 2048

1:04 — Baz93 has most chances to be first to solve 4 as he still have B to submit. Also Eryx is the first one to solve C, he uses all open tactics and guaranteed to has at least 3 problems

1:07 — Seems like polish participants have good 3D imagination — pparys solves C as well

1:08 — And first submit from GCJ and TCO champion rng_58 — correct solution on F. We now have at least blind submits on all problems

1:13 — Petr and origami

1:14 — And s-quark claims the lead with 4 problems. He solved A

1:16 — As evident from the posted image Petr works on C

1:18 — And 0O0o00OO0Oo0o0Oo joins him with all open submits

1:21 — 3 people with 4 tasks — are this our winners?

1:22 — Though one of them participates out of competition, so no

1:27 — Both Petr and tourist debugging problem C

1:29 — And Petr takes the lead with submit on C

1:31 — The contest currently fulfills all 4 criterias for ideal one — everyone solved something, nobody solved everything, every problem is solved by someone, no problem is solved by everyone

1:33 — 7 people with 4 problems atm, Baz93 in the lead

1:35 — Both Petr and tourist trying to solve A in time

1:37 — Winter is coming. Oh, I mean, end of the contest

We have out final results. Congratulations for Gennady Korotkevich for winning it all!

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By Egor, 3 years ago, In English,

Hi!

It seems that even after changing libraries to correct version Cojac still do not fully work with Java 8 — namely it fails to work with lambdas. I got following exception:

java.lang.InternalError: compileToBytecode
	at java.lang.invoke.MethodHandleStatics.newInternalError(MethodHandleStatics.java:97)
	at java.lang.invoke.LambdaForm.compileToBytecode(LambdaForm.java:460)
	at java.lang.invoke.DirectMethodHandle.makePreparedLambdaForm(DirectMethodHandle.java:280)
	at java.lang.invoke.DirectMethodHandle.preparedLambdaForm(DirectMethodHandle.java:221)
	at java.lang.invoke.DirectMethodHandle.preparedLambdaForm(DirectMethodHandle.java:210)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:82)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:102)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:107)
	at java.lang.invoke.LambdaForm$NamedFunction.resolve(LambdaForm.java:1018)
	at java.lang.invoke.DirectMethodHandle$Lazy.<clinit>(DirectMethodHandle.java:711)
	at java.lang.invoke.DirectMethodHandle.makePreparedLambdaForm(DirectMethodHandle.java:265)
	at java.lang.invoke.DirectMethodHandle.preparedLambdaForm(DirectMethodHandle.java:221)
	at java.lang.invoke.DirectMethodHandle.preparedLambdaForm(DirectMethodHandle.java:210)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:82)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:102)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:107)
	at java.lang.invoke.LambdaForm$NamedFunction.initializeInvokers(LambdaForm.java:1050)
	at java.lang.invoke.LambdaForm.<clinit>(LambdaForm.java:1637)
	at java.lang.invoke.DirectMethodHandle.makePreparedLambdaForm(DirectMethodHandle.java:256)
	at java.lang.invoke.DirectMethodHandle.preparedLambdaForm(DirectMethodHandle.java:221)
	at java.lang.invoke.DirectMethodHandle.preparedLambdaForm(DirectMethodHandle.java:210)
	at java.lang.invoke.DirectMethodHandle.make(DirectMethodHandle.java:82)
	at java.lang.invoke.MethodHandles$Lookup.getDirectMethodCommon(MethodHandles.java:1638)
	at java.lang.invoke.MethodHandles$Lookup.getDirectMethodNoSecurityManager(MethodHandles.java:1602)
	at java.lang.invoke.MethodHandles$Lookup.getDirectMethodForConstant(MethodHandles.java:1778)
	at java.lang.invoke.MethodHandles$Lookup.linkMethodHandleConstant(MethodHandles.java:1727)
	at java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNatives.java:442)
	at net.egork.TaskE.solve(TaskE.java:42)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at net.egork.chelper.tester.NewTester.run(NewTester.java:169)
	at net.egork.chelper.tester.NewTester.test(NewTester.java:93)
	at net.egork.chelper.tester.NewTester.main(NewTester.java:23)
Caused by: java.lang.NoClassDefFoundError: ch/eiafr/cojac/models/CheckedInts
	at jdk.internal.org.objectweb.asm.ClassWriter.<clinit>(ClassWriter.java:551)
	at java.lang.invoke.InvokerBytecodeGenerator.classFilePrologue(InvokerBytecodeGenerator.java:278)
	at java.lang.invoke.InvokerBytecodeGenerator.generateCustomizedCodeBytes(InvokerBytecodeGenerator.java:498)
	at java.lang.invoke.InvokerBytecodeGenerator.generateCustomizedCode(InvokerBytecodeGenerator.java:491)
	at java.lang.invoke.LambdaForm.compileToBytecode(LambdaForm.java:454)
	... 33 more

To fix this I created clone repository here and would want to welcome anyone who wants to help fix this

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By Egor, 4 years ago, translation, In English,

Just FYI

Schedule

UPD: Unique opportunity! For just 40 euro per night there is bed in twin room in Hilton West End in Budapest for May 2-5. Included breakfast, Internet and, most likely, executive lounge access. Also Petr would live in same hotel

Finalists:

Team Participants
Havka_papstvo Egor, pashka, Petr
Omnibus_trip cerealguy, niyaznigmatul, tourist

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By Egor, 4 years ago, In Russian,

Вот уже несколько лет в ACM сообществе считается нормальным выставление тайм лимита в 2 от времени работы авторского решения. Это неплохо работает в соревнованиях, проводимых по правилам АСМ (однако по моему мнению, стоит выставлять по среднему геометрическому от авторского и того, что не хотелось бы, чтобы прошло)

Однако мне кажется, что в соревнованиях, где результат итогового тестирования не известен до конца контеста такой вариант неприемлим. Локально на тл особо не потестишь, тестирование на макс тесте в запуске довольно трудоемкая штука, и когда тебе кажется, что попал в авторскую асимптотику ты этого делать скорее всего уже не будешь

Конкретно для Codeforces мне кажется разумным 2 варианта — либо ставится минимум 5х от авторского, либо макс тест добавляется в претесты. Мой коментарий про это в посте 200го раунда заминусовали, мне хотелось бы выслушать аргументы тех, кто не согласен с этой точкой зрения

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By Egor, 4 years ago, In English,

15:24 — Closing ceremony will start shortly and you can watch it on ICPC Live. That's probably it for this translation. Bye-bye, see you soon

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