The last three problems had said that bro.kun was wealthy.In the senior three,bro.kun apply to take part in postgraduate entrance examination.One day,he meet a problem about determinant.So he need your help.

multi group test,the first line input an integer N represent the rank of determinant.(N=2,3)

then input N line,each line have N integer.(0-100)

for multi group test,output the result of determinant.