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More than 50 years since the last Apollo mission, Nasa is preparing to send astronauts back to the Moon.
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the US, and in 1998 Diebold bought out IBM's share.
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。