Mouse Movement Distance

One of the units of measurement used to control a computer is the Mickey. One mickey is 1/100th of an inch, which is about 0.25 millimeters. 4 mickeys are about 1 millimeter.

Given the distance, the mouse travels in mickeys, write a program to find out how many millimeters it is. However, assume that 1 mickey is exactly 0.25 millimeters.

Input

Input is given in the following format.

$d$

The distance $d$ ($4 \leq d \leq 400$) that the mouse moves in Mickey units is given in one line. Note that $d$ is a multiple of 4.

Output

Outputs the value of the mouse movement distance converted to millimeters on a single line.

Sample Input and Output

Sample Input 1

4

Sample Output 1

1

Sample Input 2

400

Sample Output 2

100

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