File full of fictional job candidates, their points on their technical problems, emails, names, and the dates they submited their problems at, can have repeated emails, only the emails are used as id's. Give total number of unique candidates, average price of the top half, then re-adjust the grades to give an extra point to those that submitted on the first day (considered the day when the first candidate submitted it) and mallus point to those that submitted in the last day. If they all submitted on the same day: no changes. Restort them and show top 3 after the adjustment