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CF2071B.Perfecto
Perfecto
A permutation of length is perfect if, for each index (), it satisfies the following:
- The sum of the first elements is not a perfect square.
You would like things to be perfect. Given a positive integer , find a perfect permutation of length , or print if none exists.
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).
A perfect square is an integer that is the square of an integer, e.g., is a perfect square, but and are not.
Input
Each test contains multiple test cases. The first line contains the number of test cases (). The description of the test cases follows.
The first and only line of each test case contains a single integer ().
It is guaranteed that the sum of over all test cases does not exceed .
Output
For each test case:
- If no solution exists, print a single integer .
- Otherwise, print integers — the perfect permutation you find.
If there are multiple solutions, print any of them.
Note
In the first test case, there is only one permutation with length that is , which is not perfect:
- for .
In the second test case, one possible perfect permutation with length is :
- ;
- ;
- ;
- $p_1 + p_2 + p_3 + p_4 = 2 + 4 + 1 + 3 = 10 \neq x^2$.
In the third test case, one possible perfect permutation with length is :
- ;
- ;
- ;
- $p_1 + p_2 + p_3 + p_4 = 5 + 1 + 4 + 3 = 13 \neq x^2$;
- $p_1 + p_2 + p_3 + p_4 + p_5 = 5 + 1 + 4 + 3 + 2 = 15 \neq x^2$.
Samples
3
1
4
5
-1
2 4 1 3
5 1 4 3 2
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