public void TaoMaTran(int soDong, int soCot)
{
this.SoDong = soDong;
this.SoCot = soCot;
A = new int[SoDong, SoCot];
ChuaXet.Clear();
for (int i = 0; i < SoCot; i++)
{
bool tmp = true;
ChuaXet.Add(tmp);
}
CacDinhDaXoa.Clear();
}