X000
XX00
X0X0
X00X
XXX0
XX0X
X0XX
XXXX
剩下的8個是上述的X和0對換,刪去不考慮。
其中4個X000,XXX0,X0XX, XX0X結果為奇,另外4的為偶,所以50%
X000
XX00
X0X0
X00X
XXX0
XX0X
X0XX
XXXX
剩下的8個是上述的X和0對換,刪去不考慮。
其中4個X000,XXX0,X0XX, XX0X結果為奇,另外4的為偶,所以50%
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