给定一个集装箱，其长为L，宽为W和高为H，现有一批圆柱形木材，每根木材的长均为L，但是半径不同，设第i根木材半径为ri。问如何装箱，使得集装箱的空间利用率最高？-Given a container, and its length L, width W and height H, the current batch of cylindrical timber, each timber are of a long L, but the radius is different from the first i set the root timber radius ri. Asked how the packing, making maximum utilization of container space?