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