耍赖的办法(懒得动脑子):
C(3N,2)=12*K
试K=1,2,3,。。。发现K=3时方程有整数解N=3。3女6男36场比赛。
耍赖的办法(懒得动脑子):
C(3N,2)=12*K
试K=1,2,3,。。。发现K=3时方程有整数解N=3。3女6男36场比赛。
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回复:N=3
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07/12/2012 postreply
12:25:35
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