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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Bracket Pairing0.0036464219530%6.1Harden
Code Guessing0.00140277063723%3.0Mediumen
Concert Rehearsal0.027526779414%7.6Harden
Espresso!0.0065218979836%2.2Easyen
Even Substrings0.56167433210030%6.7Harden
Land Equality0.0035596619720%5.4Mediumen
Lone Rook0.0313085229418%7.6Harden
Parking Lot0.0510852416828%5.9Harden
Stream Lag0.006698145847%3.1Mediumen
Subprime0.019275826835%3.9Mediumen
Tree Number Generator0.5315634069624%7.1Harden
Ultimate Binary Watch0.00792842112239%1.9Easyen
Word Puzzle0.2345544213531%5.1Mediumen