首先求和你肯定会。$[x]$ 当 $x$ 为真时值为 $1$，$x$ 为假时值为 $0$。
by SlaineTroyard @ 2023-07-10 11:23:57
@[Franz_Liszt](/user/450246) 哦，懂了
by rainygame @ 2023-07-10 11:25:55
终于懂了qwq
by SpringQinHao @ 2024-02-20 19:10:59