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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0036467820530%6.3Harden
Code Guessing0.00140304771724%3.0Mediumen
Concert Rehearsal0.0275272210715%7.7Harden
Espresso!0.0065227885437%2.1Easyen
Even Substrings0.56167434410230%6.7Harden
Land Equality0.00355102221221%5.3Mediumen
Lone Rook0.0313085479718%8.0Harden
Parking Lot0.0510853197624%7.2Harden
Stream Lag0.0066105948346%3.1Mediumen
Subprime0.019284029835%3.8Mediumen
Tree Number Generator0.5315634209823%6.8Harden
Ultimate Binary Watch0.00792993116939%2.0Easyen
Word Puzzle0.2345551416131%4.8Mediumen