n=int(input());print((n//2)/n if n%2==0 else -(-n//2)/n) n=int(input()) n int(input()) int input() input print((n//2)/n if n%2==0 else -(-n//2)/n) print (n//2)/n if n%2==0 else -(-n//2)/n n%2==0 n%2 n 2 0 (n//2)/n n//2 n 2 n -(-n//2)/n -(-n//2) -n//2 -n n 2 n n=int(input()) int(input()) n
n=int(input());print((n//2)/n if n%2==0 else -(-n//2)/n)