Buttercola: Zenefits: Minimum Cost



Buttercola: Zenefits: Minimum Cost

Zenefits: Minimum Cost

一堆商品，买一个可以送一个，但送的那个的价格必须小于买的那个的价格（强调一下，不能等于）。给定商品总数n和每个商品的价格，求得到全部商品的最少开销。 例如：4个商品价格为[5, 4, 3, 3]，最优解为9，即买5和4，送3和3。 
两个test case: [100, 99, 98, 1, 1, 1], [100, 99, 98, 98, 97, 97, 97, 97]

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