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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0036466220331%6.2Harden
Code Guessing0.00140301370523%3.1Mediumen
Concert Rehearsal0.0275271110615%7.7Harden
Espresso!0.0065225183837%2.1Easyen
Even Substrings0.56167433410130%6.7Harden
Land Equality0.00355101021021%5.2Mediumen
Lone Rook0.0313085299418%8.1Harden
Parking Lot0.0510853097524%7.2Harden
Stream Lag0.0066104447946%3.1Mediumen
Subprime0.019281428835%3.9Mediumen
Tree Number Generator0.5315634109724%6.8Harden
Ultimate Binary Watch0.00792914115740%1.9Easyen
Word Puzzle0.2345550115932%4.6Mediumen