n = int(input())
odd = []
even = []
for i in range(1, n+1):
  if i%2 == 0:
    even.append(i)
  else:
    odd.append(i)
print(len(odd)/n) n = int(input()) n int(input()) int input() input odd = [] odd [] even = [] even [] for i in range(1, n+1):
  if i%2 == 0:
    even.append(i)
  else:
    odd.append(i) i range(1, n+1) range 1 n+1 n 1 if i%2 == 0:
    even.append(i)
  else:
    odd.append(i) i%2 == 0 i%2 i 2 0 even.append(i) even.append even append i odd.append(i) odd.append odd append i print(len(odd)/n) print len(odd)/n len(odd) len odd n n = int(input()) int(input()) n even = [] [] even odd = [] [] odd
n = int(input())
odd = []
even = []
for i in range(1, n+1):
  if i%2 == 0:
    even.append(i)
  else:
    odd.append(i)
print(len(odd)/n)