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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0032974022931%6.0Harden
Code Guessing0.00140320176524%2.9Mediumen
Concert Rehearsal0.0175277811815%7.7Harden
Espresso!0.0065257596037%2.1Easyen
Even Substrings0.56167437610628%7.2Harden
Land Equality0.00355109622721%5.2Mediumen
Lone Rook0.03130868712017%7.9Harden
Parking Lot0.0510853357924%8.0Harden
Stream Lag0.0066116253346%3.0Mediumen
Subprime0.019295332834%3.8Mediumen
Tree Number Generator0.53156347510422%6.4Harden
Ultimate Binary Watch0.00793158123139%2.0Easyen
Word Puzzle0.2345553216932%4.8Mediumen