给定N个大小不等的圆c1,c2,…,cn，现要将这N个圆排进一个矩形框中，且要求各圆与矩形框的底边相切。圆排列问题要求从N个圆的所有排列中找出有最小长度的圆排列。-given N ranging from the size of the circle c1, c2, ..., cn, when it is 000 yen N discharged into a rectangular box, demanding the rectangular box with a round of the hemline tangent. Yuan with the problem demands from the N-round identify all with a minimum length of the round with.