#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, k, l, f, x, hot_tracker = 0, cold_tracker = 0, ans = 0;
    bool riado = false;
    cin >> n >> k >> l >> f;
    for (int i=0; i < n; i++) {
        cin >> x;
        if (x >= f) {
            hot_tracker++;
            cold_tracker = l;
        } else {
            hot_tracker = 0;
            cold_tracker--;
        }
        if (hot_tracker >= k && !riado) {
            riado = true;
            ans++;
        }
        if (cold_tracker <= 0 && riado) {
            riado = false;
        }
    }
    cout << ans << '\n';
    return 0;
}