N = int(input())

L = [i for i in range(N+1)]

odd = []

for j in range(N+1):
  if L[j] % 2 == 0:
    pass
  else:
    odd.append(L[j])
  j+=1

print(len(odd)/(len(L)-1)) N = int(input()) N int(input()) int input() input i for i in range(N+1) for i in range(N+1) i range(N+1) range N+1 N 1 for i in range(N+1) i L = [i for i in range(N+1)] L [i for i in range(N+1)] odd = [] odd [] for j in range(N+1):
  if L[j] % 2 == 0:
    pass
  else:
    odd.append(L[j])
  j+=1 j range(N+1) range N+1 N 1 if L[j] % 2 == 0:
    pass
  else:
    odd.append(L[j])
   L[j] % 2 == 0 L[j] % 2 L[j] L j 2 0 odd.append(L[j]) odd.append odd append L[j] L j j+=1 j 1 print(len(odd)/(len(L)-1)) print len(odd)/(len(L)-1) len(odd) len odd len(L)-1 len(L) len L 1 odd = [] [] odd L = [i for i in range(N+1)] [i for i in range(N+1)] L j+=1 1 j N = int(input()) int(input()) N
N = int(input())

L = [i for i in range(N+1)]

odd = []

for j in range(N+1):
  if L[j] % 2 == 0:
    pass
  else:
    odd.append(L[j])
  j+=1

print(len(odd)/(len(L)-1))
