Competitions

# Value of variable 6

Find the value of the variable y for a given real value of the variable x.

#### Input

Value of the variable x.

#### Output

Print the value of the variable y up to thousandths.

Time limit 1 second
Memory limit 128 MiB
Input example #1
1

Output example #1
0.707

Author Matviychuk Sergiy Volodymyrovych
Source "ABC programming"