You need to weigh the benefit associated with the increased complexity or effort compared with the cost of adding this element into the design.
您需要将增加的复杂性或工作所相关的好处与向设计中添加此元素所带来的成本进行权衡。
2
I've got to count my way down, which means that the access would be linear in the length of the list to find the I 'th element of the list, and that's going to increase the complexity.