#include <iostream>
using namespace std;

int main() {
    int n, k, l, f;
    cin >> n >> k >> l >> f;

    int melegnap = 0, hidegnap = 0, riado = 0, db = 0;

    for (int i = 0; i < n; ++i) {
        int a;
        cin >> a;

        if (a >= f) {
            ++melegnap;
            hidegnap = 0; 
        }
        else {
            ++hidegnap;
            melegnap = 0; 
        }

        if (riado == 0 && melegnap >= k) {
            riado = 1; 
            ++db;
        }

        if (riado == 1 && hidegnap >= l) {
            riado = 0; 
        }
    }

    cout << db << endl;
    return 0;
}