You've had quite enough of confusing conversations with Americans who assume you're using Fahrenheit when Celsius is clearly the way to go. Rather than argue with them, you've settled for writing a program to conveniently convert temperatures measured in degrees Celsius to Fahrenheit instead.

You came across the following formula, which holds true given that ~F~ is a temperature in degrees Fahrenheit while ~C~ is that same temperature in degrees Celsius:

$$\displaystyle C=5/9*(F-32)$$

Given a value of ~C~, which is an integer between ~-40~ and ~40~ (inclusive), determine the corresponding value of ~F~, so that you can express the equivalent temperature in degrees Fahrenheit for the Americans' benefit.

It’s guaranteed that ~C~ will be chosen such that ~F~ will come out to be an integer.

Input Specification

The first and only line of input consists of a single integer, ~C~.

Output Specification

Output a single integer, the temperature in degrees Fahrenheit which is equivalent to ~C~ degrees Celsius.

Sample Input

20

Sample Output

68