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))