Problems from 2021 ICPC North America Division Championships

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
Alien Microwave0.0031717111567%6.9Harden
Another Substring Query Problem0.10119233615947%8.1Harden
Borders0.00149623315667%6.5Harden
Circle of Friends0.13933825871%7.3Harden
Finding Polly0.483029402460%8.3Harden
Investigating Imposters0.0035829520469%6.2Harden
Laptop Sticker0.00283994380095%1.4Easyen
Longest Common Substring0.0010060046578%4.4Mediumen
Simple Cron Spec0.0037347343392%2.1Easyen
Surveillance0.00957422764%7.7Harden
Train Line0.471466523058%8.6Harden
Window Shopping0.103342261350%8.6Harden
You Be the Judge!0.0018145632371%5.8Harden