Pencil Purchase

JOI-kun has $A$ yen, and each pencil costs $5$ yen. Calculate the maximum number of pencils JOI-kun can buy. Mathematically, the answer is given by: \( \lfloor \frac{A}{5} \rfloor \).

inputFormat

The input consists of a single integer A which represents the amount of yen JOI-kun has.

outputFormat

Output a single integer representing the maximum number of pencils that JOI-kun can buy.

sample

10

2