#include <cstdlib>
#include <iostream>
#include <math.h>

using namespace std;

long a, n, s, x, q, r, k;

long alt(long n)
{
   return (8*1+(n-1)*2*5+(n*n-2*n+1)*3);
}

int main(int argc, char *argv[])
{
  while(cin>>a)
  {

  n=pow(a,(float)1/3);

  s=12+(n-1)*3*8+(n-1)*(n-1)*3*5+(n*n*n-3*n*n+3*n-1)*3;

  x=a-n*n*n;
  k=0;

  while(x)
  {

m:   if(x<=n*n)
      {
          q=sqrt(x); r=x-q*q;

          s+=alt(q);
          if(r<=2) s+=r*5;
          else s+=2*5+(r-2)*3;

          break;
      }

      else if(x>n*n && x<=2*n*n+n)
      {

          if(x<=2*n*n) {s+=alt(n); x-=n*n; goto m;}
          else
          {
               x-=2*n*n;
               s+=2*alt(n);

               if(x==1) {s+=5; x=0;}
               else if(x>1 && x<=n) {s+=5+(x-1)*3; x=0;}
          }

      }
      else
      {
           s+=2*alt(n)+5+(n-1)*3;

           x-=(2*n*n+n);

           n+=1;
           goto m;
       }
  }

  cout<<s<<endl;

}
    return EXIT_SUCCESS;
}