#include <iostream>
#include <vector>

using namespace std;



int main(){
    int N, K, L, F;
    cin >> N >> K >> L >> F;

    int g = 0,
        l = 0,
        o = 0;

    bool n = 0;

    for(int i=0, c; i<N; i++){
        cin >> c;
        if(c >= F) g++;
        else g = 0;

        if(c < F) l++;
        else l = 0;

        if(g == K && !n){
            o++;
            n = 1;
        }
        if(l == K && n){
            n = 0;
        }
    }
    cout << o << endl;
    return 0;
}