@[AIMEE11](/user/755327) 矩阵和。
by Tom66666 @ 2023-01-25 15:04:04
或者组合数学。
by Tom66666 @ 2023-01-25 15:04:59
@[cyber_angel](/user/779885) 感谢
by AIMEE11 @ 2023-01-25 15:05:56