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<0:
        h[h.index(max(h))]=0
    else :
        h[h.index(max(h))]-=x

if sum(h)>y*b:
    print("No")
else:
    print("Yes")