Problems from 2021 ICPC North America Regionals (February 26 2022)

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0032984625830%5.9Harden
Code Guessing0.00140333779624%2.8Mediumen
Concert Rehearsal0.0175281212315%7.8Harden
Espresso!0.00652908104936%2.0Easyen
Even Substrings0.56167442711627%7.0Harden
Land Equality0.00355113623321%5.1Mediumen
Lone Rook0.03130872812818%7.5Harden
Parking Lot0.0510853678523%7.4Harden
Stream Lag0.0066163263339%4.0Mediumen
Subprime0.0192101034834%3.6Mediumen
Tree Number Generator0.53156354210920%5.7Harden
Ultimate Binary Watch0.00793433132839%2.1Easyen
Word Puzzle0.2345557617330%4.9Mediumen