Codeforce - 13A. Numbers

#include <bits/stdc++.h>
using namespace std;

int main() {
         int n;
          cin >> n;
          int sum = 0,d =0;
           for(int i =2 ;i< n ;i++){
            int t,p;
            t = i;
            p = n;
             
            while(p!=0){
             sum += p%i;
             p/=i;
            }
            d++;
           }
           int g = __gcd(sum,d);

           cout<<sum/g<<'/'<<d/g<<endl;
         
 return 0;
}