n,x,m = map(int,input().split())
A = list(map(int,input().split()))
ans = 0
now = 0

for i in range(n)[::-1]:
    a = A[i]
    c = 0
    while a >= x:
        a //= 2
        c += 1
    if c > now:
        ans += (c-now)*(i+1)
    now = max(now,c)
print("Yes" if ans <= m else "No")