Problem H: 从*开始学循环之H

Problem H: 从*开始学循环之H

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 257  Solved: 198
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Description

输入自然数n,输出2n-1行*,每行的字符依次递增,然后依次递减

Sample Input

5

Sample Output

*
**
***
****
*****
****
***
**
*