#include <stdio.h>
#include <stdlib.h>

int main () {

   FILE *fp_be = fopen("be.txt","r");
   FILE *fp_ki = fopen("ki.txt","w");

   int n;
   int i = 1;
   int m = 1;
   int top = 1;
   int bot = 1;

   fscanf(fp_be,"%d", &n);

   if (n<=0 || n>1000000) {
      fprintf(fp_ki,"Hibas bemenet.\n");

   }else{

            while (i<n) {
                ++m;
                top = 0;
                bot = m + 1;

                for(int k=1; i<n && top<m; ++k){
                        --bot;
                        ++top;
                        ++i;
                }
            }
      }

      fprintf(fp_ki,"%d/%d\n",top,bot);


   fclose(fp_be);
   fclose(fp_ki);

   return 0;
}