USACO February 2014 Contest -- Final Results

The USACO February 2014 contest featured algorithmic programming problems covering a wide range of techniques and levels of difficulty.

Click here to see the contest problems and official solutions, or to practice re-submitting solutions.

A total of 1727 participants submitted at least one solution, hailing from 75 different countries:

  778 USA  124 CHN   70 BLR   66 IRN   54 VNM   46 TUR   41 CAN
   28 MEX   26 RUS   25 DEU   23 BGR   22 ARM   19 MYS   19 GEO
   18 UKR   18 KAZ   18 IND   17 ROU   15 CUB   14 KOR   14 IDN
   14 BRA   12 TKM   12 THA   12 BGD   11 FRA   11 AZE   11 AUS
   10 SYR   10 MKD    9 VEN    9 MNG    9 GRC    9 EST    8 POL
    8 LTU    8 JPN    8 HRV    8 GBR    7 COL    6 ZAF    6 NLD
    6 FIN    6 DOM    4 TJK    4 SGP    4 NZL    4 MDA    4 CZE
    4 CYP    3 TWN    3 SVK    3 SRB    3 EGY    2 PRT    2 LVA
    2 BEL    2 AUT    2 ARG    1 TUN    1 TTO    1 SWE    1 SVN
    1 SAU    1 NOR    1 LUX    1 LKA    1 KGZ    1 ITA    1 IRL
    1 HKG    1 ESP    1 BOL    1 BIH    1 ASM

The average participant submitted solutions for 1.9 problems. In total, there were 3311 graded submissions, broken down by language as follows:

 1962 C++           
 1020 Java          
  186 Pascal        
   55 C             
   49 Python 2.7.2  
   39 Python 3.2    

Gold Division Results

Full Gold Results

The Gold division had 343 total participants, of whom 255 were pre-college students. The gold division this time around was particularly brutal, with almost nobody earning many points on the very challenging 'boarding' problem. Nonetheless, we still saw two perfect scores in the pre-college category and one in the observer category!

Top pre-college participants:

Country	Grad	Name	Score
USA	2014	Steven Hao	1000
USA	2014	Alex Pei	1000
USA	2016	Demi Guo	967
GEO	2014	Nika Svanidzzze	833
ROU	2014	Andrei Heidelbacher	767
USA	2015	Scott Wu	767
CAN	2016	Yikuan Li	733
USA	2015	Kevin Liu	733
KOR	2015	Seokhwan Choi	733
CHN	2018	Yilin You	733
CHN	2015	段 雷	733
UKR	2014	Vlad Glembotskiy	733
RUS	2014	Aidar Sayranov	733
IRN	2014	Mohammad Amin Khashkhashi Moghaddam	733
TWN	2015	Brian Chen	733
BLR	2014	Pavel Leshkevich	733
RUS	2016	Vlad Makeev	733
GEO	2016	George Skhirtladze	733
USA	2016	Lawrence Li	733
BGR	2014	Momchil Peychev	733
GEO	2015	Elene Machaidze	733
USA	2015	Alexander Dai	733
USA	2016	Alexander Wei	733
CHN	2015	Kung Chul Yen	733
IRN	2015	Mohammad Roghani	733
CZE	2014	Martin Raszyk	733
BLR	2014	Vladislav Sazanovich	733
USA	2015	Andrew He	733
AUT	2015	Gary Ye	733
USA	2014	Sujit Rao	733
VNM	2014	Hai Nguyen Hoang	733
IRN	2015	Keivan Mohtashami	733
VNM	2015	Khanh Do Ngoc	733
IDN	2014	Stefano Chiesa	733
USA	2014	Joshua Brakensiek	733
IRN	2015	Reza Soltani	733

Top observers:

Country	Name	Score
RUS	Alexey Shlyunkin	967
ROU	George Marcus	767
VNM	Le Minh Hoang Hnue	733
RUS	Ivan Belonogov	733
FRA	Jérémie Marquès	733
USA	Yujie An	733
SVK	Jakub Safin	733
TUR	Omer Eren	733
ZAF	Bruce Merry	733
USA	Jason Li	733
POL	Adam Karczmarz	733
VNM	Hiep Tran	733
RUS	Ilya Peresadin	733

Silver Division Results

Note: The silver contest was recently re-graded after fixing issues with the test data for 'auto'. Students were promoted if they reached the required cutoff (700 points in this case) either before or after the re-grading.

Full Silver Results

The Silver division had 410 total participants, of whom 347 were pre-college students.

Top pre-college participants:

Country	Grad	Name	Score
RUS	2015	Igor Kudryashov	1000
BLR	2014	Andrew Raukut	1000
USA	2014	Alan Jaffe	1000
IRN	2015	Kianoosh Abbasi	1000
USA	2014	Michael Zhao	1000
FRA	2014	David Cheikhi	1000
VNM	2014	Viet Doan Van	1000
DEU	2015	Friedrich Huebner	1000
KAZ	2015	Bekzhan Bekbolatuly	1000
RUS	2014	Valeriy Stromov	1000
USA	2016	Calvin Lee	1000
THA	2014	Songwong Tasneeyapant	1000
CAN	2015	Alex Li	1000
USA	2015	Xiaotian Le	1000
FIN	2015	Sami Kalliomäki	1000
VNM	2015	NhaDinhCaoLamGiaThuan	1000

Top observers:

Country	Name	Score
PRT	Pedro Paredes	1000
USA	Jason Fieldman	1000
JPN	Takuto Ikuta	1000
THA	Sira Songpolrojjanakul	1000
ARM	Narek Hovsepyan	833
CAN	Martin Mika	800
COL	Manuel Pineda	767
SAU	Sami Emad	767
CUB	Sandor Garcia	733
CHN	Little Bell Chan	700
IND	Sanchit Abrol	700
GBR	Louis Ricketts	700

All participants with scores at least 700 will be automatically promoted to the gold division for future contests.

Bronze Division Results

Note: The bronze contest was recently re-graded after fixing issues with the test data for 'auto' and 'scode'. Students were promoted if they reached the required cutoff (700 points in this case) either before or after the re-grading.

Full Bronze Results

The Bronze division had 974 total participants, of whom 801 were pre-college students.

Top pre-college participants:

Country	Grad	Name	Score
JPN	2015	Ken Ogura	1000
BGR	2015	Vasil Sarafov	1000
USA	2016	Suchir Balaji	1000
USA	2015	Preetham Gujjula	1000
RUS	2015	Egor Shcherbin	1000
FIN	2015	Tuukka Korhonen	1000
BRA	2015	Lucca Siaudzionis	967
USA	2015	Paul Rosa	967
USA	2016	Jack Neus	926
BRA	2017	Joao Victor Almeida de Aguiar	900
USA	2017	Andrew Yang	900
USA	2014	Mak Lee	900
USA	2016	Benjamin Yang	900

Top observers:

Country	Name	Score
NZL	Bill Rogers	1000
RUS	Nikita Shapovalov	1000
VNM	Quynh Nga Nguyen	1000
CUB	Ernesto Carvajal	1000
GRC	Ultimo Proxima	967
BLR	Aleksey Borunov	963
CHN	Peter Chenning	926
NLD	Marc Paul Noordman	896
CHN	Chao Zhang	767
CHN	Yuxuan Wang	759
CHN	Zhanhong Shi	759

All participants with scores at least 700 will be automatically promoted to the silver division for future contests.

Final Remarks

For those not yet promoted, remember that the more practice you get, the better your algorithmic coding skills will become -- please keep at it! USACO contests are designed to challenge even the very best students, and it can take a good deal of hard work to excel at them. To help you fix any bugs in your code, you can now re-submit your solutions and get feedback from the judging server using "analysis mode".

A large number of people contribute towards the quality and success of USACO contests. Those who helped with this contest include Mark Gordon, Bruce Merry, Richard Peng, Travis Hance, Fatih Gelgi, Lewin Gan, Chad Waters, and Neal Wu. Thanks also to our translators and to Clemson CCIT for providing our contest infrastructure. Finally, we are grateful to the USACO sponsors for their generous support: IBM, Usenix, TwoSigma, and Jump Trading.

We look forward to seeing everyone again for the 2014 March contest, the last contest of the season before the US Open!

Happy coding!

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