from random import randrange as rd
def make(N,X,M,A):
    n=rd(1,N+1)
    x=rd(1,X+1)
    m=rd(M+1)
    a=[rd(1,A+1) for i in range(n)]
    return n,x,m,a


def sol1(n,x,m,A):
    a=A[:]
    need=[0]*(n+1)
    for i in range(n):
        while a[i]>=x:
            need[i]+=1
            a[i]//=2
    for i in range(n-1,-1,-1):
        need[i]=max(need[i],need[i+1])
    if sum(need)<=m:return "Yes"
    return "No"

def sol2(n,x,m,A):
    a=[0]+A[:]
    dp=[[10**10]*33 for i in range(n+3)]
    dp[0][32]=0
    for i in range(1,n+1):
        sdp=[10**10]*35
        for j in range(32,-1,-1):
            sdp[j]=min(sdp[j+1],dp[i-1][j])

        for j in range(33):
            if x<=a[i]//(2**j):continue
            dp[i][j]=sdp[j]+j

    res=10**10
    for j in range(33):
        res=min(res,dp[n][j])
    if res<=m:return "Yes"
    return "No"

n,x,m=map(int,input().split())
a=list(map(int,input().split()))
print(sol2(n,x,m,a))
cnt=0
while 0:
    cnt+=1
    print(cnt)
    n,x,m,a=make(15,30,30,60)
    ans1=sol1(n,x,m,a)
    ans2=sol2(n,x,m,a)
    if ans1!=ans2:
        print("!")
        exit()
    print(ans1)