int main()
{
int t;
while(scanf("%d\n",&t)!=EOF)
{
if(t>0)
printf("1\n");
if(t==0)
printf("0.5\n");
if(t<0)
printf("0\n");
}
}
int main() { int t; while(scanf("%d\n",&t)!=EOF) { if(t>0) " >