HBC25025仓鼠与排序,排序,思维[USACO 2007 Nov G]Sunscreen题解

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To avoid unsightly burns while tanning, each of the C cows must cover her hide with sunscreen when they're at the beach. Cow i has a minimum and maximum SPF rating that will work. If the SPF rating is too low, the cow suffers sunburn; if the SPF rating is too high, the cow doesn't tan at all........The cows have a picnic basket with L bottles of sunscreen lotion, each bottle i with an SPF rating SPFi . Lotion bottle i can cover coveri cows with lotion. A cow may lotion from only one bottle.What is the maximum number of cows that can protect themselves while tanning given the available lotions?

To avoid unsightly burns while tanning, each of the C (1 ≤ C ≤ 2500) cows must cover her hide with sunscreen when they're at the beach. Cow i has a minimum and maximum SPF rating (1 ≤ minSPFi ≤ 1,000; minSPFi ≤ maxSPFi ≤ 1,000) that will work. If the SPF rating is too low, the cow suffers sunburn; if the SPF rating is too high, the cow doesn't tan at all........ The cows have a picnic basket with L (1 ≤ L ≤ 2500) bottles of sunscreen lotion, each bottle i with an SPF rating SPFi (1 ≤ SPFi ≤ 1,000). Lotion bottle i can cover coveri cows with lotion. A cow may lotion from only one bottle. What is the maximum number of cows that can protect themselves while tanning given the available lotions?

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标签： HBC25025仓鼠与排序 排序 思维[USACO 2007 Nov G]Sunscreen题解