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

Name Fastest Total Acc. Ratio Difficulty
Bracket Pairing 0.00 277 91 33% 5.5hard
Code Guessing 0.00 836 292 35% 2.0easy
Concert Rehearsal 0.02 484 70 14% 7.7hard
Espresso! 0.00 841 367 44% 1.8easy
Even Substrings 0.56 179 55 31% 7.4hard
Land Equality 0.00 669 139 21% 5.4medium
Lone Rook 0.03 245 62 25% 6.4hard
Parking Lot 0.02 158 49 31% 5.3medium
Stream Lag 0.00 367 198 54% 3.4medium
Subprime 0.01 415 147 35% 4.6medium
Tree Number Generator 0.53 251 69 27% 7.9hard
Ultimate Binary Watch 0.00 1375 585 43% 1.5easy
Word Puzzle 0.26 217 77 35% 5.1medium