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CF1998B.Minimize Equal Sum Subarrays
Minimize Equal Sum Subarrays
It is known that Farmer John likes Permutations, but I like them too!— Sun Tzu, The Art of Constructing Permutations
You are given a permutation of length .
Find a permutation of length that minimizes the number of pairs () () such that $p_i + p_{i+1} + \ldots + p_j = q_i + q_{i+1} + \ldots + q_j$.
A permutation of length is an array consisting of distinct integers from to in arbitrary order. For example, is a permutation, but is not a permutation ( appears twice in the array), and is also not a permutation ( but there is in the array).
Input
The first line contains () — the number of test cases.
The first line of each test case contains ().
The following line contains space-separated integers () — denoting the permutation of length .
It is guaranteed that the sum of over all test cases does not exceed .
Output
For each test case, output one line containing any permutation of length (the permutation ) such that minimizes the number of pairs.
Note
For the first test, there exists only one pair () () such that $p_i + p_{i+1} + \ldots + p_j = q_i + q_{i+1} + \ldots + q_j$, which is (). It can be proven that no such exists for which there are no pairs.
Samples
3
2
1 2
5
1 2 3 4 5
7
4 7 5 1 2 6 3
2 1
3 5 4 2 1
6 2 1 4 7 3 5
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