USACO 2020 US Open Contest Platinum

The last contest for USACO this year (and the last one for me)! Managed to solve all problems! Results are here: http://usaco.org/current/data/open20_platinum_results.html

Solved Sprinklers2: 0:15:07
Solved Exercise: 2:22:15
Solved Circus: 4:36:16

Copied from https://en.wikipedia.org/wiki/United_States_of_America_Computing_Olympiad:

The United States of America Computing Olympiad (USACO) is a computer programming competition primarily for secondary school students in the United States. The USACO offers four competitions during the academic year in four increasingly difficult divisions: Bronze, Silver, Gold and Platinum. Participants advance through the levels by performing well in their current division. A week-long summer training camp is held where four students are selected from a group of 24 finalists to represent the United States at the International Olympiad in Informatics (IOI). All expenses are paid for the training camp and competition at IOI. The USACO was founded in 1992 by Don Piele at the University of Wisconsin–Parkside and is currently maintained by director Brian Dean at Clemson University and a dedicated volunteer coaching staff.

Copied from usaco.org:

The USACO 2020 US Open contest is available March 27 through March 30. Participation is free, and open to all, although only high-school (pre-college) students in the USA are eligible for selection as finalists to attend the USACO training camp and to compete for the USA IOI team.

The contest is available in four divisions: bronze, silver, gold, and platinum. All returning participants start out in their former divisions, and new participants start out in the bronze division. The contest is for individuals only, not teams.

Видео USACO 2020 US Open Contest Platinum канала William Lin