488 - Triangle Wave

#include <cstdio>#include <cstdlib>int main (){    int f,n,a,i;    scanf("%d",&n);    while(n--)    {        scanf("%d%d",&a,&f);        for(i=0; i<f; )        {            for(int j=1-a; j<a; j++)            {                for(int x=0; x<a-abs(j); x++)                    printf("%d",a-abs(j));                printf("\n");            }            i++;            if(i<f)                printf("\n");        }        if(n)        printf("\n");    }    return 0;}