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

Name Fastest Shortest Total Acc. Ratio Difficulty Languages
Bracket Pairing 0.00 400 381 124 33% 4.8Medium en
Code Guessing 0.00 338 2360 522 22% 3.0Medium en
Concert Rehearsal 0.02 876 557 72 13% 7.8Hard en
Espresso! 0.00 145 1152 459 40% 2.1Easy en
Even Substrings 0.56 1722 247 72 29% 7.0Hard en
Land Equality 0.00 355 739 148 20% 5.4Medium en
Lone Rook 0.03 1953 368 78 21% 6.3Hard en
Parking Lot 0.05 1263 188 54 29% 6.5Hard en
Stream Lag 0.00 96 503 256 51% 3.3Medium en
Subprime 0.01 292 492 173 35% 4.4Medium en
Tree Number Generator 0.53 1621 273 74 27% 7.1Hard en
Ultimate Binary Watch 0.00 103 1891 784 41% 1.6Easy en
Word Puzzle 0.25 455 300 95 32% 5.7Hard en