Problem6548--打印金字塔

6548: 打印金字塔

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Time Limit : 1.000 sec  Memory Limit : 256 MiB

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Description

给定一个整数 $n$，请打印一个具有 $n$ 层结构的三角形金字塔。
例如当 $n=3$ 时，打印如下图形： 
     /\  
    /__\
   /\  /\ 
  /__\/__\
 /\  /\  /\
/__\/__\/__\

Input

单个整数：表示 $n\ (1 \leq n \leq 30)$。

Output

根据题意输出层次为 $n$ 的三角形金字塔。

Sample 1 Input 

3

Sample 1 Output 

     /\  
    /__\
   /\  /\ 
  /__\/__\
 /\  /\  /\
/__\/__\/__\

Sample 2 Input 

8

Sample 2 Output 

               /\
              /__\
             /\  /\
            /__\/__\
           /\  /\  /\
          /__\/__\/__\
         /\  /\  /\  /\
        /__\/__\/__\/__\
       /\  /\  /\  /\  /\
      /__\/__\/__\/__\/__\
     /\  /\  /\  /\  /\  /\
    /__\/__\/__\/__\/__\/__\
   /\  /\  /\  /\  /\  /\  /\
  /__\/__\/__\/__\/__\/__\/__\
 /\  /\  /\  /\  /\  /\  /\  /\
/__\/__\/__\/__\/__\/__\/__\/__\

Sample 3 Input 

1

Sample 3 Output 

 /\
/__\

Source/Category

 
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