In this problem you are to generate a triangular wave form according to a specified pair of Amplitude and Frequency.

Input and Output

The input begins with a single positive integer on a line by itself indicating the number of the cases following, each of them as described below. This line is followed by a blank line, and there is also a blank line between two consecutive inputs.

Each input set will contain two integers, each on a separate line. The first integer is the Amplitude; the second integer is the Frequency.

For each test case, the output must follow the description below. The outputs of two consecutive cases will be separated by a blank line.

For the output of your program, you will be printing wave forms each separated by a blank line. The total number of wave forms equals the Frequency, and the horizontal ``height'' of each wave equals the Amplitude. The Amplitude will never be greater than nine.

The waveform itself should be filled with integers on each line which indicate the ``height'' of that line.

NOTE: There is a blank line after each separate waveform, excluding the last one.

在这个问题中，根据所给的振幅(Amplitude)及频率(Frequency)，你的程式要产生这样的波。

Input

输入的第一列有一个整数n，代表有几组测试资料。接下来每组测试资料有2列，各有1个正整数（A、F），A代表振幅（A<=9），F代表频率。

第一列以及各组测试资料间皆有一空白行。请参考Sample input。

Output

每组测试资料请输出F个波，每个波振幅的水平高度为A。波本身是以其"高度"的内容所组成。每个波之间以一空白行分隔开来。

测试资料间也以一空白行分开。

Sample Input

132

Sample Output

122333221122333221

解题思路：唯一要注意的是两组数据之间的空行和数据内部的空行是不同的

#include
     
      int main(){
    int n,a,f,i,j,t,b;scanf("%d",&n);while(n--){           scanf("%d%d",&a,&f);           if(a==0&&f==0)break;           for(i=0;i
      
       a){                                                       t=a-(j-a);                                                       b=t;                                                       }                                               else {                                                    t=j;                                                    b=t;                                                    }                                               while(t--)                                               printf("%d",b);                                               printf("\n");                                               }                                               if(i!=f-1)printf("\n");                            }           if(n!=0)printf("\n");           }return 0;    }