def main():
    l1, l2, l3 = map(int, input().split())
    list1 = sorted([l1 + l2, l2 + l3, l3 + l1])
    list2 = sorted(map(int, input().split()), reverse=True)

    ans = 2 * sum([i * j for (i, j) in zip(list1, list2)])
    print(ans)


if __name__ == "__main__":
    main()