C | 0r |
C | mn |
C | 1r |
C | m-1n |
C | 2r |
C | m-2n |
C | mr |
C | 0n |
C | mn+r |
C | mn+r |
C | 0r |
C | mn |
C | 1r |
C | m-1n |
C | 2r |
C | m-2n |
C | mr |
C | 0n |
C | mn+r |
A.180种 | B.360种 | C.720种 | D.960种 |
A.240种 | B.216种 | C.120种 | D.72种 |
C | 15 |
C | 25 |
C | 35 |
C | 45 |
A.32 | B.31 | C.30 | D.29 |
A.72种 | B.96种 | C.120种 | D.144种 |
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