n = int(input())

m = range(1,n + 1)

a = range(1,n + 1,2)

b = len(a) / len(m)
print(b) n = int(input()) n int(input()) int input() input m = range(1,n + 1) m range(1,n + 1) range 1 n + 1 n 1 a = range(1,n + 1,2) a range(1,n + 1,2) range 1 n + 1 n 1 2 b = len(a) / len(m) b len(a) / len(m) len(a) len a len(m) len m print(b) print b b = len(a) / len(m) len(a) / len(m) b n = int(input()) int(input()) n m = range(1,n + 1) range(1,n + 1) m a = range(1,n + 1,2) range(1,n + 1,2) a
n = int(input())

m = range(1,n + 1)

a = range(1,n + 1,2)

b = len(a) / len(m)
print(b)