N = int(input())

num_odd = int(N/2+0.5)
print(num_odd/N) N = int(input()) N int(input()) int input() input num_odd = int(N/2+0.5) num_odd int(N/2+0.5) int N/2+0.5 N/2 N 2 0.5 print(num_odd/N) print num_odd/N num_odd N num_odd = int(N/2+0.5) int(N/2+0.5) num_odd N = int(input()) int(input()) N
N = int(input())

num_odd = int(N/2+0.5)
print(num_odd/N)