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

#be = open("be2.txt")
#n,k,l,f = map(int,be.readline().split())
#T = list(map(int,be.readline().split()))
#be.close()
riado = False
hoseg = 0
hideg = 0
rendel = 0
for i in range(n):
    if T[i] > f:
        hoseg += 1
        if hoseg == k and not(riado):
            riado = True
            rendel += 1
            hoseg = 0
            hideg = 0
    if T[i] < f:
        hideg += 1
        if riado and hideg == l:
            riado = False
            hideg = 0
            hoseg = 0
    if T[i] == f:
        hoseg = 0
        hideg = 0
print(rendel)