n = int(input().rstrip())
r = int(n / 2) + (n % 2)
print(r / n) n = int(input().rstrip()) n int(input().rstrip()) int input().rstrip() ().rstrip () input rstrip r = int(n / 2) + (n % 2) r int(n / 2) + (n % 2) int(n / 2) int n / 2 n 2 n % 2 n 2 print(r / n) print r / n r n n = int(input().rstrip()) int(input().rstrip()) n r = int(n / 2) + (n % 2) int(n / 2) + (n % 2) r
n = int(input().rstrip())
r = int(n / 2) + (n % 2)
print(r / n)
