ZOJ 1985: Largest Rectangle in a Histogram
2013-10-23 14:58
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链接:http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=32786
题意:给出一个序列A1,A2,A3...An求[L,R]使得(R-L+1)*min{Al, Al+1...Ar}最大。数据范围N<=10^5
题解:枚举序列取得最小值为Ai,为了成绩最大,找到最小的L和最大的R满足Ai是字序列[L,R]着哦功能值最小的元素。可以O(N)处理出这2个东西,然后O(N)扫一遍。总复杂度O(N)。
题意:给出一个序列A1,A2,A3...An求[L,R]使得(R-L+1)*min{Al, Al+1...Ar}最大。数据范围N<=10^5
题解:枚举序列取得最小值为Ai,为了成绩最大,找到最小的L和最大的R满足Ai是字序列[L,R]着哦功能值最小的元素。可以O(N)处理出这2个东西,然后O(N)扫一遍。总复杂度O(N)。
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