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Value of variable 5

Value of variable 5

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

Image 5.jpg

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 
0.000
Author Matviychuk Sergiy
Source "ABC programming"
Show problem classification
Value of variable 4
Value of variable 6