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