Given a nested list of integers, return the sum of all integers in the list weighted by their depth. Each element is either an integer, or a list -- whose elements may also be integers or other lists.

Stuck at an intersection,you always watch unfold the Fundamental Problem of Traffic. 卡在十字路口的时候，你总能观察到交通堵塞的根本问题。 On green, the first car accelerates, and then the next,and then the next, and then the ...