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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0032979424130%6.1Harden
Code Guessing0.00140327178024%2.9Mediumen
Concert Rehearsal0.0175279011915%7.8Harden
Espresso!0.0065271099637%2.1Easyen
Even Substrings0.56167439410727%6.9Harden
Land Equality0.00355110622721%5.3Mediumen
Lone Rook0.03130869712017%7.9Harden
Parking Lot0.0510853457923%8.0Harden
Stream Lag0.0066157461539%4.2Mediumen
Subprime0.019298333934%3.7Mediumen
Tree Number Generator0.53156349310521%6.2Harden
Ultimate Binary Watch0.00793230126739%2.0Easyen
Word Puzzle0.2345554116931%4.9Mediumen