n=int(input())
a=list(map(int,input().split()))
a.sort(reverse=True)
k=0
idx=0
ans=0
while True:
  for i in range(1<<k):
    if idx==len(a):break
    ans+=a[idx]*k
    idx+=1
  if idx==len(a):break
  k+=1
print(ans)