A14997 | Array Shuffling
时间限制1s
内存限制256MB
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题目描述
oolimry has an array $a$ of length $n$ which he really likes. Today, you have changed his array to $b$ , a permutation of $a$ , to make him sad.
Because oolimry is only a duck, he can only perform the following operation to restore his array:
- Choose two integers $i,j$ such that $1 \leq i,j \leq n$ .
- Swap $b_i$ and $b_j$ .
The sadness of the array $b$ is the minimum number of operations needed to transform $b$ into $a$ .
Given the array $a$ , find any array $b$ which is a permutation of $a$ that has the maximum sadness over all permutations of the array $a$ .
Because oolimry is only a duck, he can only perform the following operation to restore his array:
- Choose two integers $i,j$ such that $1 \leq i,j \leq n$ .
- Swap $b_i$ and $b_j$ .
The sadness of the array $b$ is the minimum number of operations needed to transform $b$ into $a$ .
Given the array $a$ , find any array $b$ which is a permutation of $a$ that has the maximum sadness over all permutations of the array $a$ .
输入格式
Each test contains multiple test cases. The first line contains a single integer $t$ ( $1 \leq t \leq 10^4$ ) — the number of test cases. The description of the test cases follows.
The first line of each test case contains a single integer $n$ ( $1 \leq n \leq 2 \cdot 10^5$ ) — the length of the array.
The second line of each test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \leq a_i \leq n$ ) — elements of the array $a$ .
It is guaranteed that the sum of $n$ over all test cases does not exceed $2 \cdot 10^5$ .
The first line of each test case contains a single integer $n$ ( $1 \leq n \leq 2 \cdot 10^5$ ) — the length of the array.
The second line of each test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \leq a_i \leq n$ ) — elements of the array $a$ .
It is guaranteed that the sum of $n$ over all test cases does not exceed $2 \cdot 10^5$ .
输出格式
For each test case, print $n$ integers $b_1, b_2, \ldots, b_n$ — describing the array $b$ . If there are multiple answers, you may print any.
输入输出样例
输入 #1
2 2 2 1 4 1 2 3 3
输出 #1
1 2 3 3 2 1
In the first test case, the array $[1,2]$ has sadness $1$ . We can transform $[1,2]$ into $[2,1]$ using one operation with $(i,j)=(1,2)$ .
In the second test case, the array $[3,3,2,1]$ has sadness $2$ . We can transform $[3,3,2,1]$ into $[1,2,3,3]$ with two operations with $(i,j)=(1,4)$ and $(i,j)=(2,3)$ respectively.
In the second test case, the array $[3,3,2,1]$ has sadness $2$ . We can transform $[3,3,2,1]$ into $[1,2,3,3]$ with two operations with $(i,j)=(1,4)$ and $(i,j)=(2,3)$ respectively.
C++ 编辑器
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评测结果:Accepted