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