CodeCraft-20 (Div. 2)
B
String Modification
Codeforces
1400
原题
← AC →
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Vasya has a string $s$ of length $n$. He decides to make the following modification to the string:

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  1. Pick an integer $k$, ($1 \leq k \leq n$).
  2. For $i$ from $1$ to $n-k+1$, reverse the substring $s[i:i+k-1]$ of $s$. For example, if string $s$ is qwer and $k = 2$, below is the series of transformations the string goes through: Hence, the resulting string after modifying $s$ with $k = 2$ is werq.
  • qwer (original string)
    • wqer (after reversing the first substring of length $2$)
    • weqr (after reversing the second substring of length $2$)
    • werq (after reversing the last substring of length $2$)
翻译中…

Vasya wants to choose a $k$ such that the string obtained after the above-mentioned modification is lexicographically smallest possible among all choices of $k$. Among all such $k$, he wants to choose the smallest one. Since he is busy attending Felicity 2020, he asks for your help.

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A string $a$ is lexicographically smaller than a string $b$ if and only if one of the following holds:

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  • $a$ is a prefix of $b$, but $a \ne b$;
  • in the first position where $a$ and $b$ differ, the string $a$ has a letter that appears earlier in the alphabet than the corresponding letter in $b$.
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Input

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Each test contains multiple test cases.

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The first line contains the number of test cases $t$ ($1 \le t \le 5000$). The description of the test cases follows.

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The first line of each test case contains a single integer $n$ ($1 \le n \le 5000$) — the length of the string $s$.

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The second line of each test case contains the string $s$ of $n$ lowercase latin letters.

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It is guaranteed that the sum of $n$ over all test cases does not exceed $5000$.

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Output

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For each testcase output two lines:

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In the first line output the lexicographically smallest string $s'$ achievable after the above-mentioned modification.

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In the second line output the appropriate value of $k$ ($1 \leq k \leq n$) that you chose for performing the modification. If there are multiple values of $k$ that give the lexicographically smallest string, output the smallest value of $k$ among them.

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Note

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In the first testcase of the first sample, the string modification results for the sample abab are as follows :

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  • for $k = 1$ : abab
  • for $k = 2$ : baba
  • for $k = 3$ : abab
  • for $k = 4$ : babaThe lexicographically smallest string achievable through modification is abab for $k = 1$ and $3$. Smallest value of $k$ needed to achieve is hence $1$.
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样例

Input #1
6
4
abab
6
qwerty
5
aaaaa
6
alaska
9
lfpbavjsm
1
p
Output #1
abab
1
ertyqw
3
aaaaa
1
aksala
6
avjsmbpfl
5
p
1
InputCopy OutputCopy
题目信息
题号
1316B
时间限制
1 s
内存限制
256 MB
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题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。