N = int(input())
num = 0
if N % 2 == 0:
  num = N / 2
else:
  num = int(N / 2) + 1
print(num/N) N = int(input()) N int(input()) int input() input num = 0 num 0 if N % 2 == 0:
  num = N / 2
else:
  num = int(N / 2) + 1 N % 2 == 0 N % 2 N 2 0 num = N / 2 num N / 2 N 2 num = int(N / 2) + 1 num int(N / 2) + 1 int(N / 2) int N / 2 N 2 1 print(num/N) print num/N num N num = N / 2 N / 2 num num = 0 0 num num = int(N / 2) + 1 int(N / 2) + 1 num N = int(input()) int(input()) N
N = int(input())
num = 0
if N % 2 == 0:
  num = N / 2
else:
  num = int(N / 2) + 1
print(num/N)