A13890. Special Permutation
编程题
普及/提高-
知识点
题目描述
You are given one integer $n$ ( $n > 1$ ).
Recall that 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 of length $5$ , 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).
Your task is to find a permutation $p$ of length $n$ that there is no index $i$ ( $1 \le i \le n$ ) such that $p_i = i$ (so, for all $i$ from $1$ to $n$ the condition $p_i \ne i$ should be satisfied).
You have to answer $t$ independent test cases.
If there are several answers, you can print any. It can be proven that the answer exists for each $n > 1$ .
Recall that 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 of length $5$ , 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).
Your task is to find a permutation $p$ of length $n$ that there is no index $i$ ( $1 \le i \le n$ ) such that $p_i = i$ (so, for all $i$ from $1$ to $n$ the condition $p_i \ne i$ should be satisfied).
You have to answer $t$ independent test cases.
If there are several answers, you can print any. It can be proven that the answer exists for each $n > 1$ .
输入格式
The first line of the input contains one integer $t$ ( $1 \le t \le 100$ ) — the number of test cases. Then $t$ test cases follow.
The only line of the test case contains one integer $n$ ( $2 \le n \le 100$ ) — the length of the permutation you have to find.
The only line of the test case contains one integer $n$ ( $2 \le n \le 100$ ) — the length of the permutation you have to find.
输出格式
For each test case, print $n$ distinct integers $p_1, p_2, \ldots, p_n$ — a permutation that there is no index $i$ ( $1 \le i \le n$ ) such that $p_i = i$ (so, for all $i$ from $1$ to $n$ the condition $p_i \ne i$ should be satisfied).
If there are several answers, you can print any. It can be proven that the answer exists for each $n > 1$ .
If there are several answers, you can print any. It can be proven that the answer exists for each $n > 1$ .
输入输出样例
输入 #1
2 2 5
输出 #1
2 1 2 1 5 3 4