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