## 2020 USACO February Contest -- Final Results

The 2020 USACO February contest featured algorithmic programming problems covering a wide range of techniques and levels of difficulty.

A total of 5799 distinct users logged into the contest during its 4-day span. A total of 4976 participants submitted at least one solution, hailing from 76 different countries:

 2739 USA 1244 CHN  197 KOR  109 CAN   72 MYS   52 ROU   36 IRN
31 BLR   28 VNM   28 SGP   26 FRA   25 SAU   25 POL   25 IND
25 GEO   19 GBR   17 CUB   16 RUS   16 MNG   14 KAZ   12 TWN
12 SLV   11 COL   11 BGD   10 MEX   10 LTU    9 DEU    9 ARM
8 GRC    7 ZAF    7 HKG    7 BRA    7 BGR    7 AUS    6 VEN
6 NLD    6 JPN    5 TUR    5 SYR    5 SRB    4 TJK    4 THA
3 NZL    3 ISR    3 IDN    3 HRV    3 FIN    3 CHE    3 AZE
2 WSM    2 TUN    2 TKM    2 SVN    2 PRT    2 PRK    2 PHL
2 NGA    2 LUX    2 JOR    2 ITA    2 EST    2 ESP    2 EGY
2 BEL    1 ZWE    1 UKR    1 MKD    1 MAR    1 LVA    1 KWT
1 IRQ    1 HUN    1 GUM    1 CYP    1 CMR    1 ARG


In total, there were 13498 graded submissions, broken down by language as follows:

 4594 C++11
4070 Java
2959 C++
1649 Python 3.4.0
144 Python 2.7.6
81 C
1 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 2020 February Contest, Platinum

The platinum division had 523 total participants, of whom 366 were pre-college students. Results for top scorers are here. Congratulations to all of the top participants for their excellent results!

# 1

Delegation
View problem  |   Test data   |   Solution

# 2

Equilateral Triangles
View problem  |   Test data   |   Solution

# 3

View problem  |   Test data   |   Solution

## USACO 2020 February Contest, Gold

The gold division had 723 total participants, of whom 560 were pre-college students. All competitors who scored 800 or higher on this contest are automatically promoted to the platinum division. Detailed results for all those promoted are here.

# 1

Timeline
View problem  |   Test data   |   Solution

# 2

View problem  |   Test data   |   Solution

# 3

Delegation
View problem  |   Test data   |   Solution

## USACO 2020 February Contest, Silver

The silver division had 2311 total participants, of whom 1822 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.

# 1

Swapity Swapity Swap
View problem  |   Test data   |   Solution

# 2

Triangles
View problem  |   Test data   |   Solution

# 3

Clock Tree
View problem  |   Test data   |   Solution

## USACO 2020 February Contest, Bronze

The bronze division had 2992 total participants, of whom 2239 were pre-college students. All competitors who scored 700 or higher on this contest are automatically promoted to the silver division. Detailed results for all those promoted are here.

# 1

Triangles
View problem  |   Test data   |   Solution

# 2

View problem  |   Test data   |   Solution

# 3

Swapity Swap
View problem  |   Test data   |   Solution

### Final Remarks

The 2019-2020 season is winding down --- just one more contest to go before we name our next set of finalists. I'm quite happy that this contest ran quite smoothly, particularly since it was the first being run on a new server. Performance as a whole was quite impressive despite challenging problems at all levels of the contest.

I would remind our competitors that creation of duplicate accounts and other forms of abuse of the contest system (which unfortunately seem to be on rise, especially from overseas) are not tolerated and will result in lifetime disqualification from USACO participation (sorting out these issues is perhaps also the primary reason slowing down generation of contest results).

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, Benjamin Qi, Jonathan Paulson, Spencer Compton, Travis Hance, Dhruv Rohatgi, and Nick 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: TwoSigma, D.E. Shaw, and Ansatz Trading.

We look forward to seeing everyone again for the US Open contest, our national championship.

Happy coding!

- Brian Dean ([email protected])
Director, USACO