N = int(input())
q, r = divmod(N, 2)
print((q + r) / N) N = int(input()) N int(input()) int input() input q, r = divmod(N, 2) q divmod(N, 2) divmod N 2 r print((q + r) / N) print (q + r) / N q + r q r N q, r = divmod(N, 2) divmod(N, 2) q N = int(input()) int(input()) N r = divmod(N, 2) divmod(N, 2) r
N = int(input())
q, r = divmod(N, 2)
print((q + r) / N)
