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Pencils 2

Time limit2sMemory limit2048 MB

Summary
Given A yen, find how many pencils costing 5 yen each JOI can buy, which is A divided by 5 rounded down.
Level

Easy1 of 10

Topics
Math, Implementation
Solved
No attempts yet

Problem

JOI has A yen. Find the maximum number of pencils JOI can buy, where each pencil costs 5 yen.

Input

The input is given in the following format.

A

Output

Print the maximum number of pencils JOI can buy, without the unit (本). Print nothing other than the answer.

Constraints

1 ≦ A ≦ 100

A is an integer.

Examples4

  1. Example 1

    Input
    9
    Expected output
    1

  2. Example 2

    Input
    10
    Expected output
    2

  3. Example 3

    Input
    3
    Expected output
    0

  4. Example 4

    Input
    100
    Expected output
    20