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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Ant Typing0.0131594325727%6.2Harden
Bad Packing0.0028785918822%7.7Harden
Basic Basis0.007602515120%7.4Harden
Bitonic Ordering0.0464450414028%6.9Harden
Condorcet0.007081213126%8.1Harden
Derangement Rotations0.001021235545%7.0Harden
Dominating Duos0.037685626631%6.6Harden
Exam Manipulation0.00119181061034%3.9Mediumen
Exciting Tournament0.012153964749%7.3Harden
Kth Subtree0.0667072213719%6.6Harden
Longest Common Subsequence0.0029372633546%5.1Mediumen
Magic Trick0.0059212528857%1.5Easyen
Missing Number0.0058304789029%3.9Mediumen
No Thanks!0.00663311177754%2.0Easyen
Painted Corridors0.0113302506526%8.2Harden
Rainbow Numbers0.0026151113326%6.7Harden
Rating Problems0.00511159629156%1.4Easyen
Smoothie Stand0.008994749552%2.4Easyen
Triangular Collection0.008747120844%5.7Harden
TripTik0.80184637210027%8.0Harden
Unread Messages0.0058172457133%4.4Mediumen