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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0032984826031%5.9Harden
Code Guessing0.00140334079724%2.8Mediumen
Concert Rehearsal0.0175282512515%7.7Harden
Espresso!0.00652913105436%2.0Easyen
Even Substrings0.56167443711727%7.1Harden
Land Equality0.00355114323420%5.2Mediumen
Lone Rook0.03130873912817%7.7Harden
Parking Lot0.0510853768523%7.8Harden
Stream Lag0.0066165363939%3.9Mediumen
Subprime0.0192101735235%3.6Mediumen
Tree Number Generator0.53156354210920%5.9Harden
Ultimate Binary Watch0.00793448133439%2.1Easyen
Word Puzzle0.2345557817430%4.9Mediumen