题目描述
An array A is called weird if it can be sorted in non-decreasing order by applying the given operation any number of times:
Select any index i (1 ≤ i ≤ |A|) and set A_{i} := -A_{i}.
For example: A = [2, 1, 3] is weird since after applying the operation at i = 1, A becomes [-2, 1, 3] which is sorted.
JJ has a permutation P of length N. He wants to find the number of subarrays of P which are weird. Can you help him?
------ Input Format ------
- The first line contains a single integer T — the number of test cases. Then the test cases follow.
- The first line of each test case contains an integer N — the size of the permutation P.
- The second line of each test case contains $N space-separated integers P_{1}, P_{2}, \dots, P_{N}$ denoting the permutation P.
------ Output Format ------
For each test case, output on a new line the number of weird subarrays of P.
------ Constraints ------
$1 ≤ T ≤ 10^{5}$
$1 ≤ N ≤ 10^{5}$
$P$ is a permutation.
- Sum of $N$ over all test cases does not exceed $2 \cdot 10^{5}$.
----- Sample Input 1 ------
3
3
2 3 1
3
2 1 3
4
1 2 3 4
----- Sample Output 1 ------
5
6
10
----- explanation 1 ------
Test Case 1: Weird subarrays of $P$ are: $[2], [3], [1], [2, 3], [3, 1]$.
Test Case 2: Weird subarrays of $P$ are: $[2], [1], [3], [2, 1], [1, 3], [2, 1, 3]$.
输入格式
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输出格式
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