Problems from 2021 ICPC North America Division Championships

Name
Fastest
Shortest
Total
Acc.
Ratio
Difficulty
Languages
Alien Microwave0.0031732611736%7.0Harden
Another Substring Query Problem0.101217170938422%8.1Harden
Borders0.00149665918628%6.8Harden
Circle of Friends0.139334098822%7.0Harden
Finding Polly0.4830292276026%8.3Harden
Investigating Imposters0.0035885625330%6.3Harden
Laptop Sticker0.0056867377855%1.5Easyen
Longest Common Substring0.00100224165429%4.3Mediumen
Simple Cron Spec0.0037389752959%2.1Easyen
Surveillance0.009571784224%7.6Harden
Train Line0.5714663035919%8.7Harden
Window Shopping0.103342501326%8.0Harden
You Be the Judge!0.00181209340619%5.8Harden