2019 January Contest -- Final Results
The 2019 January contest featured algorithmic programming problems covering a wide range of techniques and levels of difficulty.
A total of 4953 distinct users logged into the contest during its 4-day span. A total of 4249 participants submitted at least one solution, hailing from 74 different countries:
2623 USA 633 CHN 79 CAN 69 KOR 63 RUS 62 MYS 56 ROU
51 VNM 51 IND 47 BLR 36 UKR 34 BGD 33 GEO 30 FRA
24 TWN 22 MNG 22 KAZ 19 ARM 18 MEX 15 IRN 15 AUS
14 TUR 13 TUN 13 POL 13 DEU 12 SGP 12 HRV 11 GBR
10 COL 9 ZAF 9 SLV 9 BGR 8 HUN 7 CUB 6 TKM
6 LTU 6 IDN 6 AZE 5 SYR 4 TJK 4 NLD 4 JPN
4 ITA 3 THA 3 SWE 3 SRB 3 MDA 3 MAR 3 HKG
3 FIN 3 CMR 3 BIH 3 BEL 2 SAU 2 NZL 2 NGA
2 KGZ 2 ISR 2 IRL 2 EST 2 ESP 2 DOM 2 BRA
2 ARG 1 UZB 1 SVN 1 PRT 1 PHL 1 NPL 1 KEN
1 IRQ 1 BHS 1 ATG 1 ABW
In total, there were 12292 graded submissions, broken down by language as follows:
4407 Java
4186 C++11
2254 C++
1175 Python 3.4.0
197 Python 2.7.6
67 C
6 Pascal
Below are the detailed results for each of the platinum, gold, silver, and bronze contests. You will also find solutions and test data for each problem, and by clicking on any problem you can practice re-submitting solutions in "analysis mode". If you are logged in, you will also see your own specific results below alongside the contest(s) you took.
USACO 2019 January Contest, Platinum
The platinum division had 525 total participants, of whom 380 were pre-college students. Overall, we saw 21 perfect scores, with 5 from the USA. Full results are here. Congratulations to all of the top participants for their excellent results!
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USACO 2019 January Contest, Gold
The gold division had 988 total participants, of whom 812 were pre-college students. Despite a challenging problem line-up, we saw many very high scores in this contest. All competitors who scored 750 or higher on this contest are automatically promoted to the platinum division. Detailed results for all those promoted are here.
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USACO 2019 January Contest, Silver
The silver division had 1826 total participants, of whom 1511 were pre-college students. All competitors who scored 750 or higher on this contest are automatically promoted to the gold division. Detailed results for all those promoted are here.
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USACO 2019 January Contest, Bronze
The bronze division had 2537 total participants, of whom 2037 were pre-college students. All competitors who scored 750 or higher on this contest are automatically promoted to the silver division. Detailed results for all those promoted are here.
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Final Remarks
Halfway through the 2018-2019 season already! Overall this was a another successful contest. There were a few minor test data issues at the beginning of day 1 that were quickly corrected, but otherwise things ran smoothly from a technical perspective. Score distributions all look reasonable.
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 Dhruv Rohatgi (who designed the entire platinum problem set!), Dhruv Rohatgi (probably doesn't hurt to thank him twice), Nick Wu, Jay Leeds, Franklyn Wang, Mark Chen, Matt Fontaine, Spencer Compton, and Daniel Chiu. 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: D.E. Shaw, Jump Trading, and Ansatz Capital. We are still actively looking for additional sponsors who might be interested in supporting our efforts to contribute to the computing talent pipeline -- please feel welcome to send me a note if you know any good prospects I should consider contacting.
We look forward to seeing everyone again for the 2019 February contest.
Happy coding!
- Brian Dean ([email protected])
Director, USA Computing Olympiad