UVaOJ 488 - Triangle Wave

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