#include <fstream>

using namespace std;

int main()
{
	ifstream cin("zombie.in");
	ofstream cout("zombie.out");

    int n,d,k,nr,cnt=0,s=0,a;
    cin>>n>>d>>k;
    nr=d;

    for(int i=0;i<n;i++)
	{
		cin>>a;
		if(a<=nr)
			cnt++;
		else
		{
			if(cnt>k)
				s+=k;
			else
				s+=cnt;
			cnt=0;
			nr+=d;
		}
	}
	if(cnt>k)
		s+=k;
	else
		s+=cnt;

	cout<<s;


    return 0;
}