CF1818B.Indivisible

传统题 时间 2000 ms 内存 256 MiB 4 尝试 1 已通过 1 标签

Indivisible

You're given a positive integer nn.

Find a permutation a1,a2,,ana_1, a_2, \dots, a_n such that for any 1l<rn1 \leq l \lt r \leq n, the sum al+al+1++ara_l + a_{l+1} + \dots + a_r is not divisible by rl+1r-l+1.

A permutation of length nn is an array consisting of nn distinct integers from 11 to nn in arbitrary order. For example, [2,3,1,5,4][2,3,1,5,4] is a permutation, but [1,2,2][1,2,2] is not a permutation (22 appears twice in the array), and [1,3,4][1,3,4] is also not a permutation (n=3n=3 but there is 44 in the array).

Input

Each test contains multiple test cases. The first line contains the number of test cases tt (1t1001 \le t \le 100). Description of the test cases follows.

The first line of each test case contain a single integer nn (1n1001 \leq n \leq 100) — the size of the desired permutation.

Output

For each test case, if there is no such permutation print 1-1.

Otherwise, print nn distinct integers p1,p2,,pnp_1, p_{2}, \dots, p_n (1pin1 \leq p_i \leq n) — a permutation satisfying the condition described in the statement.

If there are multiple solutions, print any.

Note

In the first example, there are no valid pairs of l<rl \lt r, meaning that the condition is true for all such pairs.

In the second example, the only valid pair is l=1l=1 and r=2r=2, for which a1+a2=1+2=3a_1 + a_2 = 1+2=3 is not divisible by rl+1=2r-l+1=2.

in the third example, for l=1l=1 and r=3r=3 the sum a1+a2+a3a_1+a_2+a_3 is always 66, which is divisible by 33.

Samples

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