Description

Using the formula C = 5 × (F - 32) ÷ 9 (where $C$ represents Celsius temperature and $F$ represents Fahrenheit temperature) for conversion, input the Fahrenheit temperature $F$ and output the Celsius temperature $C$, accurate to $5$ decimal places.

Input Format

Input a line containing a real number $F$, representing the Fahrenheit temperature. ($F \geq -459.67$)

Output Format

Output a line containing a real number, representing the corresponding Celsius temperature, accurate to $5$ decimal places.

41

5.00000