N = int(input())
odd = 0
even = 0
for i in range(1, N+1):
  if i % 2 != 0:
    odd += 1
print(odd/N) N = int(input()) N int(input()) int input() input odd = 0 odd 0 even = 0 even 0 for i in range(1, N+1):
  if i % 2 != 0:
    odd += 1 i range(1, N+1) range 1 N+1 N 1 if i % 2 != 0:
    odd += 1 i % 2 != 0 i % 2 i 2 0 odd += 1 odd 1 print(odd/N) print odd/N odd N N = int(input()) int(input()) N odd = 0 0 odd odd += 1 1 odd even = 0 0 even
N = int(input())
odd = 0
even = 0
for i in range(1, N+1):
  if i % 2 != 0:
    odd += 1
print(odd/N)