Codeforces Round 713 (Div. 3) |
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Finished |
You are given a number $$$n$$$ and an array $$$b_1, b_2, \ldots, b_{n+2}$$$, obtained according to the following algorithm:
For example, the array $$$b=[2, 3, 7, 12 ,2]$$$ it could be obtained in the following ways:
For the given array $$$b$$$, find any array $$$a$$$ that could have been guessed initially.
The first line contains a single integer $$$t$$$ ($$$1 \le t \le 10^4$$$). Then $$$t$$$ test cases follow.
The first line of each test case contains a single integer $$$n$$$ ($$$1 \le n \le 2 \cdot 10^5$$$).
The second row of each test case contains $$$n+2$$$ integers $$$b_1, b_2, \ldots, b_{n+2}$$$ ($$$1 \le b_i \le 10^9$$$).
It is guaranteed that the sum of $$$n$$$ over all test cases does not exceed $$$2 \cdot 10^5$$$.
For each test case, output:
If there are several arrays of $$$a$$$, you can output any.
4 3 2 3 7 12 2 4 9 1 7 1 6 5 5 18 2 2 3 2 9 2 3 2 6 9 2 1
2 3 7 -1 2 2 2 3 9 1 2 6
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