n,x,m=map(int,input().split())
a=list(map(int,input().split()))
s=[0]*n
for i in range(n):
    c=a[i]
    while c>=x:
        s[i]+=1
        c//=2
r=0
R=0
for i in range(n)[::-1]:
    r+=max(0,(s[i]-R)*(i+1))
    R+=max(0,(s[i]-R))
if r<=m:print("Yes")
else:print("No")