Spoj NDIV

#include <bits/stdc++.h>
using namespace std;
#define test int t; cin>>t; while (t--)
#define ll long long int
#define fellow_junior  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int main()
{
   fellow_junior
   int a,c,d,e,f=0,i,j,k,l;
   scanf("%d %d %d",&a,&c,&d);
   for(i=a;i<=c;i++)
   {
       e=0;
       for(j=1;j*j<=i;j++)
       {
           if(i%j==0)
           {
              if(j*j<i) e+=2;
              else e++;
           }
       }
       if(e==d) f++;
   }
   printf("%d\n",f);
   return 0;
}