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