#include<fstream>
#include<algorithm>
using namespace std;
ifstream in("zombie.in");
ofstream out("zombie.out");
int a[1000005];
int main()
{
    int d,k,n;
    in>>n>>d>>k;
    for(int i=1;i<=n;i++)
        in>>a[i];
    int l,f=1,s=0;;
    for(l=2;l<=n;l++)
        if(a[l]-a[f]>=d)
        s+=min(l-f,k),f=l;
    s+=min(l-f,k);
    out<<s<<'\n';
    out.close();
    return 0;
}