2022 January Contest -- Final Results

The 2022 January contest featured algorithmic programming problems covering a wide range of techniques and levels of difficulty.

A total of 11332 distinct users logged into the contest during its 4-day span. A total of 9548 participants submitted at least one solution, hailing from 84 different countries:

 4855 USA 2840 CHN  346 CAN  320 KOR  156 IND  109 ROU   76 MYS
   75 SGP   59 VNM   55 ISR   52 BLR   46 HKG   40 TWN   36 POL
   36 GEO   34 ARM   24 RUS   23 BGD   19 GBR   19 FRA   19 AUS
   18 KAZ   18 DEU   17 IRN   14 JPN   13 SAU   13 KGZ   11 MEX
   10 TUR   10 SLV   10 PHL   10 MNG    9 TKM    9 COL    9 BRA
    8 UKR    8 THA    7 TUN    7 SYR    7 BGR    6 ESP    5 LTU
    5 IDN    5 CUB    5 CHE    4 ZAF    4 PSE    4 NLD    4 EST
    3 SVK    3 NZL    3 LUX    3 ITA    3 HUN    3 HRV    3 EGY
    3 ARG    2 VEN    2 SWE    2 PRK    2 NGA    2 IRL    2 CZE
    2 BOL    2 BEL    1 UZB    1 SRB    1 SDN    1 PER    1 PAK
    1 NOR    1 MKD    1 MAR    1 MAC    1 LKA    1 IRQ    1 GUM
    1 GRC    1 FIN    1 DJI    1 CYP    1 BRN    1 AZE    1 ARE

In total, there were 23932 graded submissions, broken down by language as follows:

 9260 C++17
 5716 C++11
 5407 Java
 3362 Python 3.6.9
  157 C
   30 Python 2.7.17

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 2022 January Contest, Platinum

The platinum division had 424 total participants, of whom 304 were pre-college students. Results for top scorers are here. Congratulations to all of the top participants for their excellent results!

1

Minimizing Haybales
View problem  |   Test data   |   Solution

2

Counting Haybales
View problem  |   Test data   |   Solution

3

Multiple Choice Test
View problem  |   Test data   |   Solution

USACO 2022 January Contest, Gold

The gold division had 816 total participants, of whom 580 were pre-college students. The gold contest ended up being quite challenging this time around, with all competitors who scored 650 or higher being promoted to the platinum division. Detailed results for all those promoted are here.

1

Drought
View problem  |   Test data   |   Solution

2

Farm Updates
View problem  |   Test data   |   Solution

3

Tests for Haybales
View problem  |   Test data   |   Solution

USACO 2022 January Contest, Silver

The silver division had 3747 total participants, of whom 2901 were pre-college students. All competitors who scored 750 or higher on this contest are automatically promoted to the gold division.

1

Searching for Soulmates
View problem  |   Test data   |   Solution

2

Cow Frisbee
View problem  |   Test data   |   Solution

3

Cereal 2
View problem  |   Test data   |   Solution

USACO 2022 January Contest, Bronze

The bronze division had 6935 total participants, of whom 5382 were pre-college students. All competitors who scored 750 or higher on this contest are automatically promoted to the silver division.

1

Herdle
View problem  |   Test data   |   Solution

2

Non-Transitive Dice
View problem  |   Test data   |   Solution

3

Drought
View problem  |   Test data   |   Solution

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 Benjamin Qi, Darren Yao, Arpan Banerjee, Nick Wu, Richard Qi, Danny Mittal, Quanquan Liu, Dhruv Rohatgi, Andi Qu, Timothy Qian, Jichao Qian, Jonathan Paulson, and Daniel Zhang. 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: Citadel, Ansatz, X-Camp, TwoSigma, EasyFunCoding, and Jump Trading.

We look forward to seeing everyone again for the next contest.

Happy coding!

- Brian Dean ([email protected])
Professor and Chair, Division of Computer Science, School of Computing, Clemson University
Director, USACO