The problem requires you to process multiple test cases where, for a given even integer n (2 ≤ n ≤ 10000), you must first output all odd numbers from 1 to n in ascending order, followed by all even numbers in ascending order. Each group of test data should be handled separately.
The input starts with an integer i (2 ≤ i < 30) indicating the number of test cases. For each test case, an even number n is provided. The output for each test case should consist of two lines: the first line contains all odd numbers separated by spaces, and the second line contains all even numbers, also separated by spaces. Additionally, there should be a blank line between different test cases.
For example, if the input is:
2 10 14
The corresponding output would be:
1 3 5 7 9 2 4 6 8 10 1 3 5 7 9 11 13 2 4 6 8 10 12 14
In terms of implementation, we can use vectors to store the odd and even numbers for each test case. For each n, iterate through all numbers from 1 to n, check if they are odd or even, and add them to the respective vectors. Then, print the contents of the vectors with appropriate spacing. After processing each test case, clear the vectors to prepare for the next one.
It's important to ensure that the output format strictly follows the requirement, including the trailing space on each line and the presence of a blank line between test cases. This helps avoid any formatting issues that might cause the solution to fail in automated testing environments.
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