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