N= int(input())
p=list(map(int,input().split()))
p.sort()
p=p[:-1]
ans=0
nu=0
for i in range(1,30):
    for j in range(2**i):
        if nu==N-1:
            break
        ans+=p[nu]*i
        nu+=1
ans2=0
nu=0
p=p[::-1]
for i in range(1,30):
    for j in range(2**i):
        if nu==N-1:
            break
        ans2+=p[nu]*i
        nu+=1
print(min(ans,ans2))