n = int(input())
print((n//2)/n if n%2==0 else (n//2+1)/n) n = int(input()) n int(input()) int input() input print((n//2)/n if n%2==0 else (n//2+1)/n) print (n//2)/n if n%2==0 else (n//2+1)/n n%2==0 n%2 n 2 0 (n//2)/n n//2 n 2 n (n//2+1)/n n//2+1 n//2 n 2 1 n n = int(input()) int(input()) n
n = int(input())
print((n//2)/n if n%2==0 else (n//2+1)/n)