Ai muon xem de thi va loi giai cua Olympiad Math thi vao day

[Đào Ngọc Dũng (dndung)]

Co mot chu co thu vui la giai cac bai toan Math Olympiad, ai co cung so thich voi chu nay thi vao day xem (toi thi chi ngo qua roi di thang :biggrin: )

http://www.kalva.demon.co.uk/