CF1743B.Permutation Value

普及/提高-

通过率:0%

AC君温馨提醒

该题目为【codeforces】题库的题目,您提交的代码将被提交至codeforces进行远程评测,并由ACGO抓取测评结果后进行展示。由于远程测评的测评机由其他平台提供,我们无法保证该服务的稳定性,若提交后无反应,请等待一段时间后再进行重试。

题目描述

You are given an integer nn . You have to construct a permutation of size nn .

A permutation is an array where each integer from 11 to ss (where ss is the size of permutation) occurs exactly once. For example, [2,1,4,3][2, 1, 4, 3] is a permutation of size 44 ; [1,2,4,5,3][1, 2, 4, 5, 3] is a permutation of size 55 ; [1,4,3][1, 4, 3] is not a permutation (the integer 22 is absent), [2,1,3,1][2, 1, 3, 1] is not a permutation (the integer 11 appears twice).

A subsegment of a permutation is a contiguous subsequence of that permutation. For example, the permutation [2,1,4,3][2, 1, 4, 3] has 1010 subsegments: [2][2] , [2,1][2, 1] , [2,1,4][2, 1, 4] , [2,1,4,3][2, 1, 4, 3] , [1][1] , [1,4][1, 4] , [1,4,3][1, 4, 3] , [4][4] , [4,3][4, 3] and [3][3] .

The value of the permutation is the number of its subsegments which are also permutations. For example, the value of [2,1,4,3][2, 1, 4, 3] is 33 since the subsegments [2,1][2, 1] , [1][1] and [2,1,4,3][2, 1, 4, 3] are permutations.

You have to construct a permutation of size nn with minimum possible value among all permutations of size nn .

输入格式

The first line contains one integer tt ( 1t481 \le t \le 48 ) — the number of test cases.

Then, tt lines follow. The ii -th of them contains one integer nn ( 3n503 \le n \le 50 ) representing the ii -th test case.

输出格式

For each test case, print nn integers — the permutation of size nn with minimum possible value. If there are multiple such permutations, print any of them.

输入输出样例

  • 输入#1

    2
    5
    6

    输出#1

    1 4 3 5 2
    4 1 6 2 5 3

说明/提示

In the first example, the permutation [1,4,3,5,2][1, 4, 3, 5, 2] is one of the possible answers; its value is 22 .

In the second example, the permutation [4,1,6,2,5,3][4, 1, 6, 2, 5, 3] is one of the possible answers; its value is 22 .

首页