import sys
from typing import Counter
readline=sys.stdin.readline
write=sys.stdout.write

N=int(readline())
A=sorted(list(map(int,readline().split())),reverse=True)
pow2=[]
for k in range(20):
    pow2+=[k]*(1<<k)
ans=0
for a,p in zip(A,pow2):
    ans+=a*p
print(ans)