Problems from 2021 ICPC North America Division Championships

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Microwave0.0031732511736%7.0Harden
Another Substring Query Problem0.101217170438322%8.2Harden
Borders0.00149665418228%6.8Harden
Circle of Friends0.139334098822%7.0Harden
Finding Polly0.4830292276026%8.3Harden
Investigating Imposters0.0035885525229%6.3Harden
Laptop Sticker0.0056642366755%1.5Easyen
Longest Common Substring0.00100222564729%4.4Mediumen
Simple Cron Spec0.0037388952659%2.1Easyen
Surveillance0.009571744124%7.7Harden
Train Line0.5714663016020%8.4Harden
Window Shopping0.103342501326%8.0Harden
You Be the Judge!0.00181208240519%5.8Harden