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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0032973722731%6.1Harden
Code Guessing0.00140311074224%3.0Mediumen
Concert Rehearsal0.0275276311515%7.7Harden
Espresso!0.0065246291737%2.2Easyen
Even Substrings0.56167437610628%7.1Harden
Land Equality0.00355109022621%5.1Mediumen
Lone Rook0.03130866411617%8.3Harden
Parking Lot0.0510853327924%7.5Harden
Stream Lag0.0066111651646%3.0Mediumen
Subprime0.019289331335%3.8Mediumen
Tree Number Generator0.53156343310324%6.2Harden
Ultimate Binary Watch0.00793087120539%2.0Easyen
Word Puzzle0.2345553016732%5.0Mediumen