N = int(input())

num_even = N//2
num_odd = N - num_even

print(num_odd/N) N = int(input()) N int(input()) int input() input num_even = N//2 num_even N//2 N 2 num_odd = N - num_even num_odd N - num_even N num_even print(num_odd/N) print num_odd/N num_odd N num_odd = N - num_even N - num_even num_odd N = int(input()) int(input()) N num_even = N//2 N//2 num_even
N = int(input())

num_even = N//2
num_odd = N - num_even

print(num_odd/N)