n, k, l, f = map(int, input().split())
a = list(map(int, input().split()))

overf = []
underf = []
for t in a:
    overf.append(t > f)
    underf.append(t < f)

overfcon = []
underfcon = []
for i in range(n):
    if overf[i] == False:
        overfcon.append(0)
    else:
        overfcon.append(overfcon[i-1] + 1 if i > 0 else 1)
    if underf[i] == False:
        underfcon.append(0)
    else:
        underfcon.append(underfcon[i-1] + 1 if i > 0 else 1)

isalert = False
alertcount = 0

for i in range(n):
    if not isalert and overfcon[i] >= k:
        isalert = True
        alertcount += 1
    if isalert and underfcon[i] >= l:
        isalert = False

print(alertcount)