from heapq import heappop,heappush
n,a,b,x,y = map(int,input().split())
H = list(map(int,input().split()))

h = []
for i in H:
    heappush(h,-i)

for i in range(a):
    if h:
        num = -heappop(h)
        num -= x
        if num <= 0:
            continue
        heappush(h,-num)

count = -sum(h)
if count <= b*y:
    print("Yes")
else:
    print("No")