Woburn Challenge 2017-18 Round 1 - Junior Division

"Ugh, It's been so hot out lately, why does it have to be $32$ degrees…"
"$32$ degrees? That's freezing!"

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:

$${\displaystyle C=\frac{5}{9}\times (F-32)}$$

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 exactly an integer, but you may output it with $0$ or more digits after the decimal point.

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