n = int(input())
print(((n//2)+(n%2))/n) n = int(input()) n int(input()) int input() input print(((n//2)+(n%2))/n) print ((n//2)+(n%2))/n (n//2)+(n%2) n//2 n 2 n%2 n 2 n n = int(input()) int(input()) n
n = int(input())
print(((n//2)+(n%2))/n)