n, A, B, X, Y = map(int, input().split())
H = list(map(int, input().split()))

prefix = [0] * (n + 1)
for i in range(n):
    prefix[i+1] = prefix[i] + H[i]

max_b = [0] * n
for i in range(n):
    max_b[i] = min(Y * B, prefix[i+1])

required_a = 0
for i in range(n):
    h = H[i]
    mb = max_b[i]
    if h <= mb:
        continue
    else:
        needed = h - mb
        a = (needed + X - 1) // X
        required_a += a

if required_a <= A:
    print("Yes")
else:
    print("No")