#yuki1736
n,a,b,x,y=map(int,input().split())
h=list(map(int,input().split()))
h.sort(reverse=True)
for i in range(a):
 if max(h)<x:
  h[h.index(max(h))]=0
 else:
  h[h.index(max(h))]-=x
if sum(h)<=y*b:
 print('Yes')
else:
 print('No')