#include<cstdio>
using namespace std;
FILE *fin=fopen("zombie.in","r");
FILE *fout=fopen("zombie.out","w");
long int i,n,d,k,pozrs,v[1500002],timp[1500002],sum;
int main()
{
	fscanf(fin,"%ld%ld%ld",&n,&d,&k);
	fscanf(fin,"%ld",&timp[1]);
	pozrs=1; v[1]=k;
	for(i=2;i<=n;++i)
	{
		fscanf(fin,"%ld",&timp[i]);
		if(timp[i]-timp[pozrs]<=d)
		{
			v[i]=k;
			v[i-1]=0;
		}
		else
		{
			v[i]=k;
			pozrs=i;
		}
		if(v[i-1]==k && v[i-2]==k) v[i]=1;
		sum+=v[i-1];	
	}
	if(v[1]==k) sum-=k;	
	sum++;
	sum+=v[n];
	fprintf(fout,"%d\n",sum);
	return 0;
}