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

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Ant Typing0.0131591524727%6.2Harden
Bad Packing0.0028783918322%7.7Harden
Basic Basis0.007602505120%7.4Harden
Bitonic Ordering0.0464448413227%7.0Harden
Condorcet0.007081213126%7.9Harden
Derangement Rotations0.001021225545%6.8Harden
Dominating Duos0.037682824930%6.7Harden
Exam Manipulation0.00119176658733%4.0Mediumen
Exciting Tournament0.012153954749%7.2Harden
Kth Subtree0.0667066213320%6.8Harden
Longest Common Subsequence0.0029367631547%5.2Mediumen
Magic Trick0.0058980514657%1.5Easyen
Missing Number0.0058301587329%3.8Mediumen
No Thanks!0.00663108169955%1.9Easyen
Painted Corridors0.0113301846435%8.0Harden
Rainbow Numbers0.0026150413026%6.7Harden
Rating Problems0.00510763607956%1.4Easyen
Smoothie Stand0.008989947653%2.4Easyen
Triangular Collection0.008746520444%5.7Harden
TripTik0.8018463519728%7.6Harden
Unread Messages0.0058163455834%4.2Mediumen