#include <iostream>
using namespace std;

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

    int x;
    int db1 = 0, db2 = 0, hoseg = 0;
    bool riado = false;

    for (int i = 0; i < n; i++) {
        cin >> x;
        if (x >= F)
        {
            db1++;
            db2 = 0;
        }
        else
        {
            db1++;
            db2 = 0;
        }

        if (db1 >= K && !riado)
        {
            db1++;
            riado = true;
        }

        if (L > 0 && db2 >= L)
        {
            riado = false;
        }
        if (L == 0 && db1 >= K)
        {
            riado = false;
        }
    }

    cout << hoseg;
    return 0;
}