Problems from ICPC North America Championship 2021

Name Fastest Total Acc. Ratio Difficulty
AND Permutation 0.22 188 35 19% 8.5hard
Apple Orchard 1.48 58 6 10% 7.2hard
Cleaning Robot 0.59 294 79 27% 7.1hard
Contest Construction 0.00 136 92 68% 4.3medium
Ketek Counting 0.06 75 27 36% 7.3hard
Mountainous Palindromic Subarray 0.03 241 119 49% 3.9medium
Permutation CFG 0.25 39 14 36% 6.9hard
Special Cycle 0.01 34 3 9% 8.7hard
The King's Guards 0.02 57 7 12% 7.4hard
The Paladin 0.00 175 80 46% 5.3medium
Token Game 0.24 49 20 41% 7.6hard
TraveLog 0.16 364 76 21% 6.2hard
You be The Judge, Again 0.03 170 100 59% 3.1medium