Sign Function

Problem Description

For any integer $n$, the sign function $\text{sign}(n)$ is defined as follows:

• $\text{sign}(n) = 0$ when $n = 0$;
• $\text{sign}(n) = -1$ when $n < 0$;
• $\text{sign}(n) = 1$ when $n > 0$.

Write a program to compute this function's value for any integer read in.

Input Format

A single line containing an integer $n$.

Output Format

Output on one line, in the format sign(n) = value, the function value of the integer $n$.

Sample Input 1

5

Sample Output 1

sign(5)=1

Sample Input 2

0

Sample Output 2

sign(0)=0

Sample Input 3

-3

Sample Output 3

sign(-3)=-1

Constraints

$-2^{31} \le n \le 2^{31} - 1$

Hint

• The definition of sign is given in the statement; just pick one of the three cases.
• The output format sign(5)=1 is assembled — check the parentheses, the equals sign, and the minus sign character by character against the samples.