CF1638A.Reverse

传统题 时间 2000 ms 内存 256 MiB 3 尝试 1 已通过 1 标签

Reverse

You are given a permutation p1,p2,,pnp_1, p_2, \ldots, p_n of length nn. You have to choose two integers l,rl,r (1lrn1 \le l \le r \le n) and reverse the subsegment [l,r][l,r] of the permutation. The permutation will become $p_1,p_2, \dots, p_{l-1},p_r,p_{r-1}, \dots, p_l,p_{r+1},p_{r+2}, \dots ,p_n$.

Find the lexicographically smallest permutation that can be obtained by performing exactly one reverse operation on the initial permutation.

Note that for two distinct permutations of equal length aa and bb, aa is lexicographically smaller than bb if at the first position they differ, aa has the smaller element.

A permutation 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 a single integer tt (1t5001 \le t \le 500) — the number of test cases. Description of the test cases follows.

The first line of each test case contains a single integer nn (1n5001 \le n \le 500) — the length of the permutation.

The second line of each test case contains nn integers p1,p2,,pnp_1, p_2, \dots, p_n (1pin1 \le p_i \le n) — the elements of the permutation.

Output

For each test case print the lexicographically smallest permutation you can obtain.

Note

In the first test case, the permutation has length 11, so the only possible segment is [1,1][1,1]. The resulting permutation is [1][1].

In the second test case, we can obtain the identity permutation by reversing the segment [1,2][1,2]. The resulting permutation is [1,2,3][1,2,3].

In the third test case, the best possible segment is [2,3][2,3]. The resulting permutation is [1,2,4,3][1,2,4,3].

In the fourth test case, there is no lexicographically smaller permutation, so we can leave it unchanged by choosing the segment [1,1][1,1]. The resulting permutation is [1,2,3,4,5][1,2,3,4,5].

Samples

4
1
1
3
2 1 3
4
1 4 2 3
5
1 2 3 4 5
1 
1 2 3 
1 2 4 3 
1 2 3 4 5 

在线编程 IDE

建议全屏模式获得最佳体验