#include<iostream> #include<cmath> #include<cstdio> #include<cstring> using namespace std; int main() { int i,j,n,sum = 0,a = 1,b = 1; cin >>n; for(i = 1; sum < n;i++) { sum +=i; } sum = 0; for(j = 1; j < i-1; j++) { sum +=j; } if(i%2 == 0) { a = n-sum; b = i-a; cout << b << "/" << a; } else { a = n-sum; b = i-a; cout << a << "/" << b; } return 0; }