def main():
  from sys import stdin
  readline = stdin.readline
  n = int(readline())
  A = list(map(int, readline().split()))
  A.sort(reverse=True)
  ans = 0
  def keta(x):
    ret = 0
    while x > 0:
      ret += 1
      x //= 2
    return ret
  k = 0
  now = 0
  for i in range(n):
    now += 1
    error(i, k)
    ans += A[i] * k
    if now == 2**k:
      k += 1
      now = 0

  print(ans)
  
if __name__ == "__main__":
  import sys
  readline = sys.stdin.readline
  def error(*args, end='\n'):
    print(*args, end=end, file=sys.stderr)
  main()