Online Judge | Problem Set | Authors | Online Contests | User | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest |
Re:个人想到的解题思路In Reply To:个人想到的解题思路 Posted by:200730690105 at 2011-04-12 15:45:10 算错了,怪不得得不出更好的结论,唉 由于“行4”的因子行“行1”,“行2”都变换过了,所以可以对“行4”进行变换,即减去“行1”和“行2” 1 1 1 1 1 1 0 1 0 1 1 1 0 0 2 0 2 2 0 0 0 2 0 0 1 2 3 2 6 6 1 2 3 4 6 12 由于“行6”的因子行“行1”,“行2”,“行3”都变换过了,所以可以对“行4”进行变换,即减去“行1”,“行2”和“行3” 1 1 1 1 1 1 0 1 0 1 1 1 0 0 2 0 2 2 0 0 0 2 0 2 0 0 0 0 2 2 1 2 3 4 6 12 最后对“行12”进行变换,即减去前面所有行 1 1 1 1 1 1 0 1 0 1 1 1 0 0 2 0 2 2 0 0 0 2 0 2 0 0 0 0 2 2 0 0 0 0 0 4 最后行列式的值为1*1*2*2*2*4=32 其实f(1)=1,f(n)=n-∑f(d) (d|n且0<d<n),f(n)就是欧拉函数... Followed by: Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator