from fractions import Fraction

N=int(input('请输入项'))

n=0

while n*(n-1)/2>=N or N>n*(n+1)/2:

n+=1

if n%2==0:

a=N-n*(n-1)/2
print(Fraction(a/(n-a+1)))

else:

a=N-n*(n-1)/2
print(Fraction((n-a+1)/a))