Bird Programming Language: Part 1

void bb_BeginPerf();
void bb_EndPerf();
void bb_PrintInt(int x);

int LNKO(int i, int j)
{
	while (i != j)
	{
		if (i > j) i -=j;
		else j -= i;
	}
	
	return i;
}

void GccEntry()
{
	bb_BeginPerf();
	
	int Ret = 0, i, j;
	for (i = 1; i <= 25000; i++)
		for (j = 1; j <= 25000; j++)
			Ret += LNKO(i, j);
		
	bb_EndPerf();
	bb_PrintInt(Ret);
}