2018 January Contest -- Final Results
This was the second contest of the 2017-2018 season. A total of 3398 distinct users logged into the contest during its 4-day span. A total of 2782 participants submitted at least one solution, hailing from 66 different countries:
1884 USA 210 CHN 47 GEO 45 MYS 39 CAN 36 BLR 32 KAZ
31 ROU 30 FRA 29 VNM 29 RUS 29 ARM 26 IND 21 MEX
21 BGD 19 TUR 18 KOR 14 UKR 13 AUS 12 BGR 11 IDN
11 COL 10 DEU 9 ITA 9 IRN 8 CUB 7 TWN 7 JPN
7 GRC 7 FIN 7 AZE 6 ZAF 6 NLD 6 HUN 6 HRV
6 GBR 6 EST 6 ARG 5 SYR 5 POL 5 LTU 4 TKM
4 MDA 4 KGZ 3 SVK 3 SGP 3 NZL 2 SRB 2 MNG
2 LVA 2 CMR 2 BRA 2 BIH 2 BEL 1 THA 1 SVN
1 PHL 1 NGA 1 MUS 1 ISR 1 ISL 1 IRL 1 GIN
1 ESP 1 COG 1 BOL
In total, there were 6973 graded submissions, broken down by language as follows:
2684 Java 2265 C++11 1356 C++ 434 Python 3.4.0 143 Python 2.7.6 67 C 24 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 2018 January Contest, Platinum
The platinum division had 472 total participants, of whom 345 were pre-college students. Results for top scorers are here. Congratulations to all of the top participants for their excellent results!
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USACO 2018 January Contest, Gold
The gold division had 609 total participants, of whom 505 were pre-college students. All competitors who scored 650 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 2018 January Contest, Silver
The silver division had 1077 total participants, of whom 913 were pre-college students. All competitors who scored 700 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 2018 January Contest, Bronze
The bronze division had 1497 total participants, of whom 1220 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
It's hard to believe we are already half-way through the 2017-2018 season! The January contest went smoothly from a technical standpoint. As apparent from the results, problem difficulty was reasonably high (as a result, we used slightly more generous promotion cutoffs in some divisions). Only a handful of participants managed to achieve near-perfect scores in the higher divisions.
For those still waiting to achieve promotion, remember that 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. Remember that the more practice you get, the better your algorithmic coding skills will become! To help you fix any bugs in your code, you are encouraged to consult the official solutions above and to make use of "analysis mode" to re-submit improved versions of your solutions.
A large number of people contribute towards the quality and success of USACO contests. Those who helped with this contest include Mark Gordon, Lewin Gan, Nick Wu, Dhruv Rohatgi, Jay Leeds, and Mark Chen. Thanks also to Amy Quispe for helping to maintain our social media presence (Facebook: https://www.facebook.com/UsacoContests, Twitter: (https://twitter.com/UsacoContests), our translators for allowing us to offer this contest in five additional languages, to Clemson CCIT for providing our main contest server, and to our sponsors for their generous support: D.E. Shaw, Jump Trading, and Ansatz Capital.
We hope you will all join us for our next contest in late February.
Happy coding!
- Brian Dean ([email protected])
Director, USA Computing Olympiad
Associate Professor of Computer Science, Clemson University