Non-equal Neighbours(容斥/dp/单调栈/前缀和/好题)

对方正在debug 发布时间：2022-01-03 19:58:27 ，浏览量：3

题目

题意：给定一个长度为n的正整数数组 a i a_i ai，求有多少数组 b i b_i bi，满足 1 < = b i < = a i , b i ! = b i + 1 1

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Non-equal Neighbours(容斥/dp/单调栈/前缀和/好题)

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