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问题描述:某国家的硬币体系包含N种面值(其中一定有面值为1的),现有一种商品价格为P,最少要用多少枚硬币可以买下-Problem Description: A national system contains N kinds of coins with a face value (which must have a face value of 1), the current price of a commodity for P, at least take the number of coins can be bought