#48 백준 파이썬 [1193] 분수찾기

https://www.acmicpc.net/submit/1193

#Solution

a = int(input())

group_num = a
num = 1
while group_num > 0:
    group_num -= num
    num += 1

total_num = (num-2)*(num-1)/2

numerator = a - total_num
denominator = num - numerator

if num % 2 !=0:
    print("{0}/{1}".format(int(numerator),int(denominator)))
else:
    print("{0}/{1}".format(int(denominator),int(numerator)))