//实验3-2 计算符号函数的值


#include <stdio.h>
#include <math.h>

int main() {
    int n = 0;
    scanf("%d",&n);
    int  sign;
    if(n > 0)
        sign=1;
    else if(n < 0)
        sign=-1;
    else 
        sign=0;
    printf("sign(%d) = %d", n, sign);
}