n = int(input())
oddCount = len(list(filter(lambda x: x % 2 == 1, range(1,n + 1))))
print(oddCount / n) n = int(input()) n int(input()) int input() input oddCount = len(list(filter(lambda x: x % 2 == 1, range(1,n + 1)))) oddCount len(list(filter(lambda x: x % 2 == 1, range(1,n + 1)))) len list(filter(lambda x: x % 2 == 1, range(1,n + 1))) list filter(lambda x: x % 2 == 1, range(1,n + 1)) filter lambda x: x % 2 == 1 x % 2 == 1 x % 2 x 2 1 x range(1,n + 1) range 1 n + 1 n 1 print(oddCount / n) print oddCount / n oddCount n n = int(input()) int(input()) n oddCount = len(list(filter(lambda x: x % 2 == 1, range(1,n + 1)))) len(list(filter(lambda x: x % 2 == 1, range(1,n + 1)))) oddCount
n = int(input())
oddCount = len(list(filter(lambda x: x % 2 == 1, range(1,n + 1))))
print(oddCount / n)