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。
Author(s): Ruixuan Dong, Xiuqin Liu，更多细节参见Line官方版本下载
Director Kang Mi-so says the genre requires spectacular moments，详情可参考Line官方版本下载
Burke’s treatment of Kaley lasted about six months and that period took place seven years ago.
4.4 1019. 链表中的下一个更大节点