Time Limit: 1.0 s

Memory Limit: 256.0 MB

Description

You are given an integer N. in one operation you can:

• subtract 2 or
• subtract 3 from N.

What is the minimum number of operation to make the number N equal to zero.

Input

an integer N
\(2 <= N <= 100\)

Output

one integer : number of operations to make N equal to zero.

Sample

6

2