import heapq
N,A,B,X,Y = map(int,input().split())
lsH = list(map(lambda x:-int(x),input().split()))
heapq.heapify(lsH)

for i in range(A):
    hp = heapq.heappop(lsH)
    v = hp + X
    heapq.heappush(lsH, v)

vsum = 0
for j in lsH:
    if j >= 0:
        continue
    else:
        vsum -= j

if vsum > B*Y:
    print('No')
else:
    print('Yes')