题目描述
You are given an integer N.
Find $a permutation P = [P_{1}, P_{2}, \ldots, P_{N}]$ of the integers ${1, 2, \ldots, N$} such that sum of averages of all consecutive triplets is minimized, i.e.
$\sum_{i=1}^{N-2} \frac{P_{i} + P_{i+1} + P_{i+2}}{3}$
is minimized.
If multiple permutations are possible, print any of them.
------ Input Format ------
- The first line of input will contain a single integer T, denoting the number of test cases.
- The first and only line of each test case contains an integer N, the size of the permutation.
------ Output Format ------
For each test case, output on a new line a permutation which satisfies the above conditions.
------ Constraints ------
$1 ≤ T ≤ 1000$
$3 ≤ N ≤ 10^{5}$
- The sum of $N$ over all test cases won't exceed $3\cdot 10^{5}$.
----- Sample Input 1 ------
2
4
3
----- Sample Output 1 ------
3 2 1 4
3 2 1
----- explanation 1 ------
Test case $1$: The sum is $\frac{P_{1} + P_{2} + P_{3}}{3} + \frac{P_{2} + P_{3} + P_{4}}{3} = \frac{3 + 2 + 1}{3} + \frac{2 + 1 + 4}{3} = 6/3 + 7/3 = 4.333\ldots$ Among all possible permutations of $\{1, 2, 3, 4\}$, this is one of the permutations which provides the minimum result.
Test case $2$: The sum is $\frac{3+2+1}{3} = 6/3 = 2$. Every permutation of size $3$ will have this value, hence it is the minimum possible.
输入格式
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输出格式
见题面