mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    A = list(map(int, input().split()))

    A.sort(reverse=True)
    F = []
    for i in range(20):
        F.extend([i] * (1 << i))
    ans = 0
    for i in range(N):
        ans += A[i] * F[i]
    print(ans)


if __name__ == '__main__':
    main()