Not really the toughest challenge, is it?
Anyone with half an ounce of sense would recommend either a database solution, or even a simple command line script; the Unix utilities to do this simple kind of data manipulation have been around for longer than half those languages were even an idea.
Looks like more of an undergraduate assignment for the week than a challenge for professionals - perhaps this is a reflection of the malaise affecting IBM these days?
Biting the hand that feeds IT
