Problems
sgn function
sgn function
Find the value of sgn function:
Input
One integer x (-109 ≤ x ≤ 109).
Output
Print the value of sgn function for given value of x.
Input example #1
4
Output example #1
1
Input example #2
0
Output example #2
0
Input example #3
-2
Output example #3
-1