N = int(input())
count = 0
for i in range(1,N+1):
  if i % 2 == 1:
    count += 1
  else:
    pass
print(count/N) N = int(input()) N int(input()) int input() input count = 0 count 0 for i in range(1,N+1):
  if i % 2 == 1:
    count += 1
  else:
    pass i range(1,N+1) range 1 N+1 N 1 if i % 2 == 1:
    count += 1
  else:
    pass i % 2 == 1 i % 2 i 2 1 count += 1 count 1 print(count/N) print count/N count N count += 1 1 count count = 0 0 count N = int(input()) int(input()) N
N = int(input())
count = 0
for i in range(1,N+1):
  if i % 2 == 1:
    count += 1
  else:
    pass
print(count/N)
