You've got 1000 apps to install for a major software launch. Just 20 hours before the launch, your security team alerts you that one of the apps contains a dangerous virus. You have access to 10 test computers that can be used to detect the virus. The virus is so aggressive that it will completely crash any system exactly 18 hours after installation. But before the crash at the 18th hour, there are no warning signs or symptoms. Is there a way you can identify the infected app using just these 10 test computers before the launch?