HDU - 2838：Cow Sorting

最新推荐文章于 2019-03-18 20:48:45 发布

wingrez

最新推荐文章于 2019-03-18 20:48:45 发布

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分类专栏：【记录】算法题解

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本文介绍了HDU 2838 Cow Sorting问题，要求将奶牛按脾气从大到小排序，每次交换相邻两头奶牛的时间代价为它们的脾气之和。给出了解决该问题的思路和参考代码，利用树状数组计算最小总代价。

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Cow Sorting

来源：HDU

标签：树状数组

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题目

Sherlock’s N (1 ≤ N ≤ 100,000) cows are lined up to be milked in the evening. Each cow has a unique “grumpiness” level in the range 1…100,000. Since grumpy cows are more likely to damage Sherlock’s milking equipment, Sherlock would like to reorder the cows in line so they are lined up in increasing order of grumpiness. During this process, the places of any two cows (necessarily adjacent) can be interchanged. Since grumpy cows are harder to move, it takes Sherlock a total of X + Y units of time to exchange two cows whose grumpiness levels are X and Y.
Please help Sherlock calculate the minimal time req

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