dp吧
by long_ting @ 2024-03-29 13:27:53
比如说设fij为当前有i个蓝色，j个红色的方案数
by long_ting @ 2024-03-29 13:28:50
en,想了想，没懂
by Arrtan_73 @ 2024-03-29 13:29:59