from math import ceil
n = int(input())
a = ceil(n/2)
print(a/n) from math import ceil n = int(input()) n int(input()) int input() input a = ceil(n/2) a ceil(n/2) ceil n/2 n 2 print(a/n) print a/n a n n = int(input()) int(input()) n a = ceil(n/2) ceil(n/2) a
from math import ceil
n = int(input())
a = ceil(n/2)
print(a/n)