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

dv = 0
for i in range(N-1,-1,-1):
    a = A[i]
    a >>= dv
    while a>=X:
        dv+=1
        M-=i+1
        a>>=1
print("Yes" if M>=0 else "No")