CF670A Holidays

On the planet Mars a year lasts exactly $ n $ days (there are no leap years on Mars). But Martians have the same weeks as earthlings — 5 work days and then 2 days off. Your task is to determine the minimum possible and the maximum possible number of days off per year on Mars.

The first line of the input contains a positive integer $ n $ ( $ 1

Print two integers — the minimum possible and the maximum possible number of days off per year on Mars.

In the first sample there are $ 14 $ days in a year on Mars, and therefore independently of the day a year starts with there will be exactly $ 4 $ days off . In the second sample there are only $ 2 $ days in a year on Mars, and they can both be either work days or days off.