USACO January 2014 Contest -- Final Results

The USACO January 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 1697 participants submitted at least one solution, hailing from 72 different countries:

  783 USA  158 CHN   53 IRN   51 BLR   44 CAN   42 VNM   35 MEX
   33 TUR   26 UKR   23 DEU   23 BGR   23 ARM   22 IND   20 ROU
   20 KOR   18 IDN   16 VEN   16 MNG   15 EST   14 RUS   14 KAZ
   12 SRB   12 LTU   12 FRA   11 HRV   11 BRA   11 BGD   10 POL
   10 AZE    9 TKM    9 CUB    9 AUS    8 GRC    8 FIN    7 ZAF
    7 THA    7 SGP    7 NLD    7 JPN    7 GEO    6 SYR    4 NZL
    4 MYS    4 MKD    4 GBR    4 CYP    4 COL    3 TWN    3 SVK
    3 MDA    3 EGY    3 DOM    3 BEL    2 TUN    2 TJK    2 MNE
    2 LVA    2 CZE    2 BIH    2 AUT    1 VAT    1 SVN    1 PRT
    1 ITA    1 ISR    1 ISL    1 GIB    1 ESP    1 DNK    1 ASM
    1 ARG    1 ALB

The average participant submitted solutions for 2.0 problems. In total, there were 3474 graded submissions, broken down by language as follows:

 2031 C++           
 1013 Java          
  244 Pascal        
   73 C             
   63 Python 3.2    
   50 Python 2.7.2  

Gold Division Results

Full Gold Results

The Gold division had 248 total participants, of whom 175 were pre-college students.

Quite a few pre-college participants turned in perfect or near-perfect scores. Our top contenders this time were:

Country	Grad	Name	Score
USA	2014	Joshua Brakensiek	1000
IDN	2014	Stefano Chiesa	1000
RUS	2014	Nikolay Kalinin	1000
CHN	2015	Yuetong Wang	1000
CHN	2014	Lemon Xu	1000
USA	2014	Bill Cooperman	967
VNM	2014	Nguyễn Quang Dũng	967
JPN	2018	Yuta Takaya	967
AUS	2015	Ishraq Huda	967
USA	2014	Steven Hao	967
USA	2015	Scott Wu	967
BLR	2015	Barbara Kuskova	967

We also had quite a few high scores in the observer group:

Country	Name	Score
KOR	ChanMin Kim	1000
RUS	Ivan Belonogov	1000
HRV	Lovro Puzar	1000
RUS	Nikolay Kuznetsov	1000
ZAF	Bruce Merry	1000
DEU	Fabian Gundlach	1000
SVK	Peter Fulla	967
POL	Adam Karczmarz	967
LTU	Karolis Kusas	967
SVK	Jakub Safin	933
JPN	Uwi Tenpen	933

Silver Division Results

Full Silver Results

The Silver division had 354 total participants, of whom 285 were pre-college students.

Congrats to the 16 outstanding individuals with perfect scores in the pre-college group:

Country	Grad	Name	Score
ISL	2017	Jack Helgosen	1000
CHN	2018	Yilin You	1000
POL	2014	Jakub Staroń	1000
POL	2016	Wiktoria Kośny	1000
VNM	2015	Nguyen Minh Hoang	1000
SGP	2017	Wen Yuen Pang	1000
IRN	2016	AliReza Vezvaei	1000
UKR	2014	Denis Stratonov	1000
CHN	2015	Yukun Ma	1000
DEU	2015	Philip Wellnitz	1000
USA	2015	Eric Xu	1000
BLR	2014	Vlad Sobol	1000
USA	2014	Michael LoPiccolo	1000
AUS	2014	Daaron Chiu	1000
IND	2016	Malvika Joshi	1000
CAN	2016	Yikuan Li	1000

Also, congrats to our observers with perfect scores:

Country	Name	Score
VNM	Hieu Lang	1000
RUS	Ivan Fefer	1000
VNM	Hiep Tran	1000
USA	Albert Gural	1000
VNM	Hung Nguyen	1000
NLD	Jan Elffers	1000
ARG	Miguel Maurizio	1000
TWN	Zeus Yang	1000
USA	Sand Junior	1000
VNM	Quan Tran	1000
VEN	José Sánchez	1000
FRA	Jérémie Marquès	1000

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

Bronze Division Results

Full Bronze Results

The Bronze division had 1095 total participants, of whom 863 were pre-college students.

Scores across the entire bronze division were quite good, with a large number of perfect submissions in the pre-college group:

Country	Grad	Name	Score
USA	2015	Gideon Leeper	1000
USA	2015	Kelvin Wang	1000
USA	2018	Harshal Sheth	1000
IRN	2015	Nima Vahidi	1000
USA	2016	Eric Nie	1000
USA	2018	Justin Xie	1000
USA	2014	Courtney Guo	1000
CHN	2016	Tian Yanfei	1000
USA	2017	Karena Chow	1000
EST	2016	Andres Unt	1000
USA	2015	Weston Hill	1000
USA	2016	Sue Yang	1000
FRA	2015	Corentin Lauverjat	1000
USA	2015	Yinan Zheng	1000
ZAF	2015	Ulrik de Muelenaere	1000
VNM	2014	Viet Doan Van	1000
USA	2016	Theodore Faust	1000
RUS	2014	Vsevolod Stepanov	1000
USA	2017	Byron Xu	1000
USA	2015	Alexander Katz	1000
ROU	2015	Tiberiu Marin	1000
USA	2016	Wilbur Li	1000
FRA	2014	David Cheikhi	1000
USA	2016	Grant Barkley	1000
MNG	2016	Batkhuyag Batsaikhan	1000
ROU	2015	Gabriel Robert Inelus	1000
DEU	2015	Martin Helfrich	1000
USA	2015	Max Yang	1000
CHN	2016	Yubai Xie	1000
USA	2016	David Long	1000
USA	2017	Alec Sun	1000
IRN	2015	Morteza Hosseini	1000
USA	2014	Michael Wang	1000
CHN	2016	Zilun Sun	1000

Top participants in the observer group were:

Country	Name	Score
CHN	Xinyi Zhao	1000
CUB	Sandor Garcia	1000
GEO	Irakli Popkhadze	1000
USA	Andy Ruiz Cabrera	1000
USA	Trisha Debacco	1000
MEX	Luis Martin Jiménez Rodríguez	1000
DEU	Martin Böschen	1000
ARM	Mushegh Shahinyan	967
CHN	Egg Gao	900
IRN	Ali Asadi	833
CHN	Zhu Dai	833
GBR	Louis Ricketts	833
RUS	Albert Sverdlov	833
IRN	Pooyan Ali Panahi	833
USA	Dooghiijoon Gav Poor	833

All participants with scores at least 600 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, Nathan Pinsker, Kalki Seksaria, Fatih Gelgi, Richard Peng, Travis Hance, William Hu, and Bruce Merry. 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 February contest.

Happy coding!

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