@[sbj_ssfer_noier](/user/575363)
您的 change 函数没有考虑乘法时对加法懒惰标记的修改
by Killer_joke @ 2023-07-17 21:14:14
@[Killer_joke](/user/915814)
大佬确实把判断语句去掉就AC了，谢谢大佬
by __Zhx__ @ 2023-07-18 08:21:59