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CF1977B.Binary Colouring
Binary Colouring
You are given a positive integer . Find any array of integers for which the following holds:
- ,
- is , , or for all ,
- $x = \displaystyle{ um_{i=0}^{n - 1}{a_i \cdot 2^i}}$,
- There does not exist an index such that both and .
It can be proven that under the constraints of the problem, a valid array always exists.
Input
Each test contains multiple test cases. The first line of input contains a single integer () — the number of test cases. The description of the test cases follows.
The only line of each test case contains a single positive integer ().
Output
For each test case, output two lines.
On the first line, output an integer () — the length of the array .
On the second line, output the array .
If there are multiple valid arrays, you can output any of them.
Note
In the first test case, one valid array is , since .
In the second test case, one possible valid array is , since $(0) \cdot 2^0 + (-1) \cdot 2^1 + (0) \cdot 2^2 + (0) \cdot 2^3 + (1) \cdot 2^4 = -2 + 16 = 14$.
Samples
7
1
14
24
15
27
11
19
1
1
5
0 -1 0 0 1
6
0 0 0 -1 0 1
5
-1 0 0 0 1
6
-1 0 -1 0 0 1
5
-1 0 -1 0 1
5
-1 0 1 0 1
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