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1544_Fracta

2022-5-16 18:17| 发布者: Hocassian| 查看: 38| 评论: 0|原作者: 肇庆学院ACM合集

摘要:

C:\Users\Administrator\Downloads\2019-10-12-10-14-2-89503906848500-Problem List-采集的数据-后羿采集器.html

Pro.ID

1544

Title

Fractal

Title链接

http://10.20.2.8/oj/exercise/problem?problem_id=1544

AC

Submit

Ratio

0.00%

时间&空间限制

Time Limit: 1000/500 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)

描述

A fractal is an object or quantity that displays self-similarity, in a somewhat technical sense, on all scales. The object need not exhibit exactly the same structure at all scales, but the same "type" of structures must appear on all scales.

A box fractal is defined as below :

A box fractal of degree 1 is simply
X
A box fractal of degree 2 is
X X
_X
X X
If using B(n-1) to represent the box fractal of degree n-1, then a box fractal of degree n is defined recursively as following
```
B(n-1)      B(n-1)
      B(n-1)
B(n-1)      B(n-1)
```

Your task is to draw a box fractal of degree n.

输入

The input consists of several test cases. Each line of the input contains a positive integer n which is no greater than 7. The last line of input is a negative integer -1 indicating the end of input.

输出

Description

A box fractal is defined as below :

A box fractal of degree 1 is simply
X
A box fractal of degree 2 is
X X
_X
X X
If using B(n-1) to represent the box fractal of degree n-1, then a box fractal of degree n is defined recursively as following
```
B(n-1)      B(n-1)
      B(n-1)
B(n-1)      B(n-1)
```

Your task is to draw a box fractal of degree n.

Input

The input consists of several test cases. Each line of the input contains a positive integer n which is no greater than 7. The last line of input is a negative integer -1 indicating the end of input.

Output

For each test case, output the box fractal using the 'X' notation. Please notice that 'X' is an uppercase letter. Print a line with only a single dash after each test case.

Sample Input

1
2
3
4
-1

Sample Output

X
-
X X
X
X X
-
X X X X
X X
X X X X
X X
X
X X
X X X X
X X
X X X X
-
X X X X X X X X
X X X X
X X X X X X X X
X X X X
X X
X X X X
X X X X X X X X
X X X X
X X X X X X X X
X X X X
X X
X X X X
X X
X
X X
X X X X
X X
X X X X
X X X X X X X X
X X X X
X X X X X X X X
X X X X
X X
X X X X
X X X X X X X X
X X X X
X X X X X X X X
-