Tìm kiếm
3
0
2
0
1
0
0
0
0
0
0
0
1
0
2
0
0
0
1
0
0
0
0
0
2
1
7
2
2
0
1
0
3
0
2
0
2
0
1
0
1
0
3
1
1
0
1
0
1
0
0
0
0
0
0
0
Khối: Khối 9
1
0
