N, X, M = map(int, input().split())
A = list(map(int, input().split()))

xs = [0] * N
for i, a in enumerate(A):
    x = a
    while x >= X:
        xs[i] += 1
        x //= 2

for i in reversed(range(1, N)):
    xs[i-1] = max(xs[i-1], xs[i])

mp = 0
x = 0
for i in reversed(range(N)):
    if x < xs[i]:
        mp += (i+1) * (xs[i]-x)
        x = xs[i]

if mp <= M:
    print('Yes')
else:
    print('No')