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):
    num = -heappop(h)
    num -= x
    if num <= 0:
        continue
    heappush(h,-num)

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