#include <bits/stdc++.h>

using namespace std;
int N,K,L,F,tmp,megoldas,v,c;
vector<int> ho;
int main()
{
    //ifstream f("ho.in");
    cin>>N>>K>>L>>F;
    ho.push_back(0);
    for(int i=1;i<=N;i++){
        cin>>tmp;
        ho.push_back(tmp);

    }
    ho.resize(N+1);
    bool active = false;
    for(int i=1;i<=N;i++){
        if(ho[i]>F)
        {
            v++;
            c=0;
            if(v==K && !active)
            {
                megoldas++;
                active=true;
            }

        }
        else
        {
            c++;
            v=0;
            if(c==L && active)
            {
                active=false;
            }
        }
    }

    cout<<megoldas;
    return 0;
}