摘要：DescriptionFor some years, quite a lot of work has been put into listening to electromagnetic radio signals received from space, ... 阅读全文

摘要：Winter has come, but at the Ural State University heating is not turned on yet. There’s one little problem: the University is hea... 阅读全文

摘要：Description有一个球形空间产生器能够在n维空间中产生一个坚硬的球体。现在，你被困在了这个n维球体中，你只知道球面上n+1个点的坐标，你需要以最快的速度确定这个n维球体的球心坐标，以便于摧毁这个球形空间产生器。Input第一行是一个整数n(1#inc... 阅读全文

摘要：基础首先，n元1次方程组 ⎧⎩⎨⎪⎪⎪⎪⎪⎪a1,1x1+a1,2x2+⋯+a1,nxn=b1a2,1x1+a2,2x2+⋯+a2,nxn=b2⋯an,1x1+an,2x2+⋯+an,nxn=bn 可以写成 ⎡⎣⎢⎢⎢⎢a1,1a2,1⋯an,1a1,2a2... 阅读全文