The Price of a Cake

On October 1, 2019, a reduced tax rate system was introduced along with a consumption tax hike. Yae's favorite cake will be taxed at 10% if she eats it in the store, and at 8% if she takes it home. Yae was curious to know how much she would pay for the cake if she ate it in the store or took it home.

Write a program that reads the price of the cake without tax and calculates how much more you will pay to eat the cake in the store compared to how much more you will pay to take it home.

Input

The input is given in the following form.

$p$

The price of a cake $p$ ($50 \leq p \leq 5,000$) with excluding tax is given in a line. $p$ is a multiple of 50.

Output

Output the difference between eating the cake in the store and taking it home on one line.

Sample Input and Output

Sample Input 1

50

Sample Output 1

1

Sample Input 2

1500

Sample Output 2

30

Sample Input 3

5000

Sample Output 3

100

 

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