Problems from 2020 ICPC North America Regionals (March 6 2021)

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Ant Typing0.01270120929825%5.9Harden
Bad Packing0.0028793020122%7.5Harden
Basic Basis0.007602865519%7.2Harden
Bitonic Ordering0.0440754615228%6.8Harden
Condorcet0.007081523120%8.5Harden
Derangement Rotations0.001021686840%6.4Harden
Dominating Duos0.037691528531%6.3Harden
Exam Manipulation0.00119195266034%3.7Mediumen
Exciting Tournament0.0021531214940%7.2Harden
Kth Subtree0.0667082415218%6.0Harden
Longest Common Subsequence0.0029385538645%5.2Mediumen
Magic Trick0.0059696554557%1.4Easyen
Missing Number0.0058323093529%3.7Mediumen
No Thanks!0.00663575194054%1.8Easyen
Painted Corridors0.0113302816724%8.0Harden
Rainbow Numbers0.0026155113725%6.6Harden
Rating Problems0.00512252683456%1.3Easyen
Smoothie Stand0.0089109756251%2.2Easyen
Triangular Collection0.008751322143%5.5Harden
TripTik0.80173841910726%7.7Harden
Unread Messages0.0058184660133%4.4Mediumen