2018 February Contest -- Final Results

This was the third contest of the 2017-2018 season. A total of 3048 distinct users logged into the contest during its 4-day span. A total of 2613 participants submitted at least one solution, hailing from 65 different countries:

 1717 USA  280 CHN   51 GEO   36 CAN   33 BLR   32 ROU   32 KAZ
   27 MYS   26 FRA   25 RUS   25 IRN   23 IND   21 VNM   19 ARM
   18 KOR   16 BGD   15 SYR   15 BRA   12 AUS   11 BGR    9 TUN
    9 THA    9 SGP    9 JPN    9 FIN    9 DEU    8 MEX    7 ZAF
    7 TWN    6 UKR    6 NLD    6 EST    5 SVK    5 IDN    5 HRV
    5 GRC    5 COL    5 AZE    4 TUR    4 POL    4 MKD    4 ARG
    3 TKM    3 LTU    3 KGZ    3 ITA    3 IRL    3 HUN    2 GBR
    2 EGY    2 DOM    2 CUB    1 UZB    1 UGA    1 SVN    1 PHL
    1 PER    1 NPL    1 NGA    1 MDA    1 ISL    1 HKG    1 CYP
    1 CCK    1 BIH

In total, there were 6461 graded submissions, broken down by language as follows:

 2517 Java
 2044 C++11
 1338 C++
  365 Python 3.4.0
  139 Python 2.7.6
   44 C
   14 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 February Contest, Platinum

The platinum division had 477 total participants, of whom 361 were pre-college students. Despite a challenging problem lineup, we saw an impressive number of high scores, with several perfects. Results for top scorers are here. Congratulations to all of the top participants for their excellent results!

1

Slingshot
View problem  |   Test data   |   Solution

2

New Barns
View problem  |   Test data   |   Solution

3

Cow Gymnasts
View problem  |   Test data   |   Solution

USACO 2018 February Contest, Gold

The gold division had 480 total participants, of whom 398 were pre-college students. 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.

1

Snow Boots
View problem  |   Test data   |   Solution

2

Directory Traversal
View problem  |   Test data   |   Solution

3

Taming the Herd
View problem  |   Test data   |   Solution

USACO 2018 February Contest, Silver

The silver division had 1020 total participants, of whom 870 were pre-college students. The silver contest had some relatively challening problems on it this time around, and our promotion cutoff is therefore a bit more generous. All competitors who scored 650 or higher on this contest are automatically promoted to the gold division. Detailed results for all those promoted are here.

1

Rest Stops
View problem  |   Test data   |   Solution

2

Snow Boots
View problem  |   Test data   |   Solution

3

Teleportation
View problem  |   Test data   |   Solution

USACO 2018 February Contest, Bronze

The bronze division had 1215 total participants, of whom 964 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.

1

Teleportation
View problem  |   Test data   |   Solution

2

Hoofball
View problem  |   Test data   |   Solution

3

Taming the Herd
View problem  |   Test data   |   Solution

Final Remarks

Everything ran smoothly for the February contest, with an impressive number of high scores in all divisions. We are now nearing the end of our season with just one contest left to go!

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, Mark Gordon, Lewin Gan, Bruce Merry, Mark Chen, Travis Hance, and Anson Hu. 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.

Please join us in another month for the US Open, our national championship contest.

Happy coding!

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

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