A14222. Almost Rectangle
编程题
普及/提高-
知识点
题目描述
There is a square field of size $n \times n$ in which two cells are marked. These cells can be in the same row or column.
You are to mark two more cells so that they are the corners of a rectangle with sides parallel to the coordinate axes.
For example, if $n=4$ and a rectangular field looks like this (there are asterisks in the marked cells):
$$\begin{matrix} .&.&*&.\\ .&.&.&.\\ *&.&.&.\\ .&.&.&.\\ \end{matrix}$$
Then you can mark two more cells as follows
$$\begin{matrix} *&.&*&.\\ .&.&.&.\\ *&.&*&.\\ .&.&.&.\\ \end{matrix} $$
If there are several possible solutions, then print any of them.
You are to mark two more cells so that they are the corners of a rectangle with sides parallel to the coordinate axes.
For example, if $n=4$ and a rectangular field looks like this (there are asterisks in the marked cells):
$$\begin{matrix} .&.&*&.\\ .&.&.&.\\ *&.&.&.\\ .&.&.&.\\ \end{matrix}$$
Then you can mark two more cells as follows
$$\begin{matrix} *&.&*&.\\ .&.&.&.\\ *&.&*&.\\ .&.&.&.\\ \end{matrix} $$
If there are several possible solutions, then print any of them.
输入格式
The first line contains a single integer $t$ ( $1 \le t \le 400$ ). Then $t$ test cases follow.
The first row of each test case contains a single integer $n$ ( $2 \le n \le 400$ ) — the number of rows and columns in the table.
The following $n$ lines each contain $n$ characters '.' or '\*' denoting empty and marked cells, respectively.
It is guaranteed that the sums of $n$ for all test cases do not exceed $400$ .
It is guaranteed that there are exactly two asterisks on the field. They can be in the same row/column.
It is guaranteed that the solution exists.
The first row of each test case contains a single integer $n$ ( $2 \le n \le 400$ ) — the number of rows and columns in the table.
The following $n$ lines each contain $n$ characters '.' or '\*' denoting empty and marked cells, respectively.
It is guaranteed that the sums of $n$ for all test cases do not exceed $400$ .
It is guaranteed that there are exactly two asterisks on the field. They can be in the same row/column.
It is guaranteed that the solution exists.
输出格式
For each test case, output $n$ rows of $n$ characters — a field with four asterisks marked corresponding to the statements. If there multiple correct answers, print any of them.
输入输出样例
输入 #1
6 4 ..*. .... *... .... 2 *. .* 2 .* .* 3 *.* ... ... 5 ..... ..*.. ..... .*... ..... 4 .... .... *... *...
输出 #1
*.*. .... *.*. .... ** ** ** ** *.* *.* ... ..... .**.. ..... .**.. ..... .... .... **.. **..