a |
a |
0 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
0 |
a |
0 |
A.1 | B.2 | C.3 | D.4 |
a |
a |
a |
0 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
0 |
a |
0 |
a |
b |
a |
b |
A.3 | B.2 | C.4 | D.
|
a |
a |
b |
A.(-
| B.(
| C.(-
| D.(-1,-1) |
a |
a |
. |
OA |
. |
OB |
. |
OC |
. |
0 |
A.2:1 | B.3:1 | C.4:3 | D.3:2 |
i |
j |
a |
i |
j |
b |
i |
j |
a |
b |
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