描述：prices[i] 为第 i 件商品价格。第 i 件商品可获得折扣 prices[j]，其中 j 是满足 j i 且 prices[j] <= prices[i] 的最小下标；若无则无折扣。返回每件商品折扣后的最终价格。
如同许多人工智能驱动的体验，我们可能会使用你生成的用户输入内容（如聊天数据）训练并优化用于提供服务的模型。
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A game played on a turning wicket and dominated by spin was decided, appropriately, after a decisive, savage twist. Just as it looked as if England’s unconvincing progress through the World Cup was the one thing destined to remain on its predictable path Rehan Ahmed and Will Jacks spun the game, and the group, in their team’s favour.
The ISS does have its own defenses, of course. Fabric-y buffers envelope some of the systems, and a bumper called the Whipple Shield helps blunt impact. That shield is only built to stop debris up to about 1 cubic centimeter, though, and the debris tracker is only designed to catch pieces 10 cubic centimeters and larger. In other words, there’s a gap in defenses.