on March 13, 2020, 1:55 p.m.
on Feb. 7, 2020, 5:35 a.m.
on Feb. 7, 2020, 4:46 a.m.
on Jan. 20, 2020, 2:07 p.m.
on Jan. 9, 2020, 3:29 p.m.
on Jan. 21, 2020, 9:56 a.m.
2.Cơ bản-Ngôn ngữ lập trình (0.800 points)
4.Cơ bản-Thuật toán (2 points)
5.Cấu trúc-giải thuật (8 points)
