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Min

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 82    Accepted Submission(s): 19


Problem Description
给定 $n$ 个数 $a_{1...n}$,你需要求有几个 $\{1...n\}$ 的排列 $p$,满足对于 $1\leq i\leq n-2$,有 $min(a_{p_i},a_{p_{i+1}}) \leq min(a_{p_{i+1}},a_{p_{i+2}})$

由于答案可能过大,你只需要输出答案对 $998244353$ 取模后的值
 

Input
第一行一个正整数 $T(1\leq T\leq 100)$,表示数据组数。

接下来对于每组数据,第一行一个整数 $n (1\leq n\leq 1000)$

接下来一行 $n$ 个数字,表示 $a_{1...n}$,其中 $1\leq a_i\leq n$
 

Output
输出 $T$ 行,每行一个整数表示该组数据的答案
 

Sample Input
1 3 1 2 3
 

Sample Output
4
 

Source
 

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