POJ 3614 - Sunscreen - Dilthey - 博客园



POJ 3614 - Sunscreen - Dilthey - 博客园

把牛按minSPF从小到大排序一下，防晒霜按SPF排序一下。

然后遍历防晒霜lontion[1...L]，对于lotion[i]，把所有满足minSPF小于等于lontion[i].SPF的牛都找出来，入队。

我们将这个队列定义为按cow[i].maxSPF的从小到大排序的优先队列，那么，每次取出的队首，都是当前要求最苛刻（SPF要求范围最小的）那头牛，先满足这些牛，如果当前这 种防晒霜能满足这头牛，就用掉一瓶，否则就放弃这头牛。

反复如此，直到所有防晒霜用完。


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