int activityNotifications(vector<int> expenditure, int d) {
int cnt=0;
int k=int(d/2);
vector<int>::iterator it;
int med;
for(it=expenditure.begin();it<expenditure.end()-d;it++)
{
    vector<int> a(it,it+d);
    sort(a.begin(),a.end());
    if (d % 2 != 0) 
    {
      if (*(it + d) >= 2 * (a[k]))
      {
        cnt++;
      }
    }
     else
     {
      med = (((a[k] + a[k - 1]) / 2) + 1) * 2;
      if (*(it + d) >=med) {
        cnt++;
      }
     }
}
return cnt;
}