Codeforces Round 1077 (Div. 2)
A
Divisible Permutation
Codeforces
800
原题
←B →
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You are given an integer $n$. Construct a permutation$^{\text{∗}}$ $p$ of length $n$ satisfying the following condition:

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  • $\lvert p_i - p_{i+1} \rvert$ is divisible by $i$ for every $1 \le i \le n-1$.
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It can be proven that such a permutation always exists under the constraints of the problem.

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$^{\text{∗}}$A permutation of length $n$ is an array consisting of $n$ distinct integers from $1$ to $n$ in arbitrary order. For example, $[2,3,1,5,4]$ is a permutation, but $[1,2,2]$ is not a permutation ($2$ appears twice in the array), and $[1,3,4]$ is also not a permutation ($n=3$ but there is $4$ in the array).

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Input

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Each test contains multiple test cases. The first line contains the number of test cases $t$ ($1 \le t \le 100$). The description of the test cases follows.

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The only line of each test case contains a single integer $n$ ($2 \le n \le 100$) — the length of the permutation $p$ to be constructed.

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Output

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For each test case, output $n$ integers $p_1,p_2,\ldots,p_n$ ($1 \le p_i \le n$, all $p_i$-s are distinct) — the permutation you constructed.

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If there are multiple valid permutations, you may output any of them.

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Note

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In the first test case, $p=[1,2]$ satisfies the condition because $\lvert p_1-p_2\rvert=\lvert 1-2\rvert=1$, which is divisible by $1$.

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In the second test case, $p=[2,3,1]$ satisfies the condition because:

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  • $\lvert p_1-p_2\rvert=\lvert 2-3\rvert=1$, which is divisible by $1$, and
  • $\lvert p_2-p_3\rvert=\lvert 3-1\rvert=2$, which is divisible by $2$.
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样例

Input #1
2
2
3
Output #1
1 2
2 3 1
InputCopy OutputCopy
题目信息
题号
2188A
时间限制
1 s
内存限制
256 MB
标签
构造

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。