def main():
    L1, L2, L3 = map(int, input().split())
    cycle_num = list(map(int, input().split()))

    cycle_length = [2*(L2+L3), 2*(L3+L1), 2*(L1+L2)]

    cycle_num.sort()
    cycle_length.sort(reverse=True)
    print(sum(num * length for num, length in zip(cycle_num, cycle_length)))


if __name__ == "__main__":
    main()