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A14966 | Sorting Parts

时间限制1s
内存限制256MB
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题目描述

You have an array $a$ of length $n$ . You can exactly once select an integer $len$ between $1$ and $n - 1$ inclusively, and then sort in non-decreasing order the prefix of the array of length $len$ and the suffix of the array of length $n - len$ independently.

For example, if the array is $a = [3, 1, 4, 5, 2]$ , and you choose $len = 2$ , then after that the array will be equal to $[1, 3, 2, 4, 5]$ .

Could it be that after performing this operation, the array will not be sorted in non-decreasing order?

输入格式

There are several test cases in the input data. The first line contains a single integer $t$ ( $1 \leq t \leq 100$ ) — the number of test cases. This is followed by the test cases description.

The first line of each test case contains one integer $n$ ( $2 \leq n \leq 10^4$ ) — the length of the array.

The second line of the test case contains a sequence of integers $a_1, a_2, \ldots, a_n$ ( $1 \leq a_i \leq 10^9$ ) — the array elements.

It is guaranteed that the sum of $n$ over all test cases does not exceed $10^4$ .

输出格式

For each test case of input data, output "YES" (without quotes), if the array may be not sorted in non-decreasing order, output "NO" (without quotes) otherwise. You can output each letter in any case (uppercase or lowercase).

输入输出样例

输入 #1
3
3
2 2 1
4
3 1 2 1
5
1 2 2 4 4
输出 #1
YES
YES
NO
C++ 编辑器
输入
输出