计算飞船相对测站的位置矢量单位矢量在赤道坐标系中的三个分量-Calculation of the spacecraft relative position vector of the station unit vector in the equatorial coordinate system of the three subscales
皇后问题:在N*N的方格里放置皇后,要求不能放在同一行、同一列、同一对角线上。输入所有适合条件的情况。-Queen : N* N in the box, placed the empress, on the request can not be the same line, the same series on the same diagonal. The importation of all suitable conditions.