February 2012 Contest -- Final Results

The USACO 2012 February Contest featured algorithmic programming problems covering a wide range of techniques and levels of difficulty. Click here to see the contest problems and solutions.

A total of 950 participants competed, from 63 different countries:

 372 USA  47 CHN  39 IRN  33 VNM  32 ROU  30 GEO  25 BLR  21 RUS
  20 KAZ  19 MEX  19 CAN  17 IDN  17 EST  14 ARM  12 TWN  11 VEN
  11 UKR  11 KOR  11 HKG  11 BGR  11 AUS  10 YUG  10 BGD   9 SRB
   9 DEU   8 TUR   8 LTU   8 ITA   8 GRC   7 TKM   7 POL   7 HRV
   7 CUB   5 ZAF   5 MKD   5 FRA   5 BRA   4 SGP   4 IND   3 TJK
   3 SVN   3 SVK   3 EGY   3 COL   2 SHN   2 PER   2 DOM   2 CZE
   2 AUT   1 SYR   1 SWE   1 QAT   1 PRT   1 NED   1 LVA   1 LBN
   1 GBR   1 ESP   1 DNK   1 DJI   1 BEN   1 AZE   1 ABW

The average participant submitted solutions for 2.4 problems. In total, there were 2231 graded submissions, broken down by language as follows:

   1335 C++
    584 Java
    199 Pascal
     61 C
     52 Python

Gold Division Results

The Gold division had 147 total participants, of whom 100 were pre-college students.

Full Gold Results

Congratulations to our five participants with perfect scores:

Country	Grad	Name	Score
USA	2012	Alex Chen	1000
RUS	2012	Alex Gordeev	1000
BLR	2013	Vlad Podtelkin	1000
BLR	2012	Gennady Korotkevich	1000
CHN	2012	Martin Token	1000

There were three perfect scores in the observer category:

Country	Name	Score
POL	Adam Karczmarz	1000
ZAF	Bruce Merry	1000
DEU	Thomas Fersch	1000

Silver Division Results

[Note: silver results have been re-graded due to a bug in the test data for the 'relocate' problem]

The silver division had 204 total participants, of whom 164 were pre-college students.

Full Silver Results

There were 13 perfect scores in the pre-college group. Congratulations to the following participants for their excellent results!

Country	Grad	Name	Score
IDN	2012	Ahmad Zaky	1000
ITA	2013	Davide Pallotti	1000
RUS	2012	Vlad Chabanenko	1000
USA	2014	Douglas Chen	1000
HKG	2013	Chun Yin Sampson Lee	1000
TWN	2013	Winston Chiang	1000
BLR	2012	Konstantin Vilchevski	1000
LTU	2013	Vladimir Daglis	1000
IRN	2013	Sobhan Miryoosefi	1000
GEO	2012	Tornike Gogniashvili	1000
TWN	2013	Han-Zhong Wang	1000
RUS	2013	Dmitry Gorbunov	1000
ROU	2014	Mihai Gheorghe	1000

Five participants in the observer category also earned perfect scores:

Country	Name	Score
VNM	Vuduy Duc	1000
BGD	Nahiyan Kamal	1000
RUS	Sergey Vedernikov	1000
VNM	ThanhCanh NguyenHuu	1000
BRA	Gabriel Portal	1000

All participants with scores at least 750 will be automatically promoted to the gold division for future contests.

Bronze Division Results

A total of 609 participants competed in the bronze division, 490 of them pre-college students.

Full Bronze Results

Congratulations to the 22 pre-college students and 16 observers with perfect scores! The pre-college bronze winners are:

Country	Grad	Name	Score
USA	2013	David Mace	1000
EST	2013	Sandra Schumann	1000
BLR	2014	Vadim Zakharenko	1000
USA	2014	Derek Modzelewski	1000
TUR	2014	Emirhan Dogan	1000
YUG	2013	Marko Bakovic	1000
CAN	2012	Rui Lin	1000
RUS	2016	Vlad Makeev	1000
CHN	2014	IwfWcf Zhang	1000
IRN	2013	Farzad Abdolhoseini	1000
SGP	2012	Bernard Teo	1000
USA	2013	Abram Sanderson	1000
USA	2014	Charles Liu	1000
RUS	2012	William Sahakyan	1000
TJK	2012	Akramjon Azamov	1000
UKR	2012	Oleksandr Driuk	1000
USA	2013	Dominic Yurk	1000
IRN	2013	Pouya Payandeh	1000
USA	2013	Woncheol Jeong	1000
RUS	2015	Ekaterina Mukoseeva	1000
CAN	2013	Michael Young	1000
UKR	2012	Oleksandr Skoryk	1000

The bronze observers with perfect scores are:

Country	Name	Score
DEU	Isatis Schmidt	1000
GEO	Lasha Lakirbaia	1000
USA	Lao San	1000
CHN	Jiawei Hua	1000
KOR	JeongWoo Ji	1000
AUS	Benjamin Roberts	1000
CHN	Jacob Jiang	1000
CAN	Wesley May	1000
USA	Fred Code	1000
USA	Joseph Hedberg	1000
VNM	Truong Minh Thanh Buu	1000
CUB	Leandro Castillo	1000
CUB	Alfonso2 Peterssen	1000
BGD	MdEnzam Hossain	1000
CHN	Tank Chen	1000
CHN	Chuanshun Yuan	1000

All participants with scores at least 750 will be automatically promoted to the silver division for future contests.

Final Remarks

I'm quite happy with the results of this contest. On the technical side, everything seemed to run smoothly. Overall score distributions in all divisions were quite reasonable.

Thanks are due to a number of extremely helpful individuals in setting up this contest. Thanks especially to Neal Wu, Mark Gordon, Fatih Gelgi, Richard Peng, Travis Hance, Bruce Merry, Nathan Pinsker, Ray Li, Ben Cousins, and Alex Chen for helping with problems, solutions, and test data. As always, if you would like to contribute to USACO contests as well by sending me high-quality problems, please do not hesitate to do so! Thanks also to the Clemson CCIT staff for their help with our contest infrastructure, to our translators, who help increase the reach of our contests dramatically, and finally to our sponsors, whose support is absolutely crucial and much appreciated: IBM, Usenix, TwoSigma, and Jump Trading.

Happy coding!

- Brian Dean ([email protected])
Director, USA Computing Olympiad