#!/usr/bin/env python3
import sys


def main():
    N = int(input())
    A = list(map(int, input().split()))
    A.sort(reverse=True)
    ans = 0
    for i in range(1, N + 1):
        ans += (len(bin(i)[2:]) - 1) * A[i - 1]
    print(ans)
    return

if __name__ == '__main__':
    main()