Problems from 2021 ICPC North America Division Championships

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Microwave0.0031732411736%6.9Harden
Another Substring Query Problem0.101217169638223%8.2Harden
Borders0.00149664517928%6.9Harden
Circle of Friends0.139334078822%7.0Harden
Finding Polly0.4830292276026%8.3Harden
Investigating Imposters0.0035885325029%6.4Harden
Laptop Sticker0.0056596364155%1.5Easyen
Longest Common Substring0.00100222564729%4.4Mediumen
Simple Cron Spec0.0037388952659%2.1Easyen
Surveillance0.009571744124%7.7Harden
Train Line0.5714663016020%8.4Harden
Window Shopping0.103342471123%8.4Harden
You Be the Judge!0.00181206540420%5.8Harden