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#1363. 双调排序

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Noah 建议玩以下纸牌游戏:你有一副牌,每张牌上都写着一个不同的正整数。这些牌被洗乱并排成一行。你的目标是重新排列这一行牌,使得牌上的数值先单调递增,然后单调递减。

唯一允许的操作是交换相邻的两张牌。只有相邻的牌才能交换位置。

注意,在最终排好序的序列中,初始的递增部分可以为空(即整个序列呈降序排列)。同样,递减部分也可以为空。

将这些牌按要求排列所需的最少移动次数是多少?

输入格式

输入的第一行包含一个整数 $n$ ($1 \le n \le 3 \cdot 10^5$),表示牌的数量。

接下来的 $n$ 行,每行包含一个整数 $c$ ($1 \le c \le 10^9$)。这些是初始顺序下的牌面数值。所有数值各不相同。

输出格式

输出一个整数,表示将牌按要求排列所需的最少移动次数。

样例

样例输入 1

8
7
4
8
10
1
2
6
9

样例输出 1

7

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