N = int(input())

even = N // 2
odd = N - even

print(odd/N) N = int(input()) N int(input()) int input() input even = N // 2 even N // 2 N 2 odd = N - even odd N - even N even print(odd/N) print odd/N odd N even = N // 2 N // 2 even N = int(input()) int(input()) N odd = N - even N - even odd
N = int(input())

even = N // 2
odd = N - even

print(odd/N)