应该没错啊……
by muvum @ 2020-08-27 18:17:21
@[muvum](/user/235696)
``a[j].x=max(a[2*j-1].x,a[2*j].x);``
x 修改了，id 没修改
by 芝麻xxxx @ 2020-08-27 18:34:09
@[芝麻xxxx](/user/296357) 谢谢！AC了！
by muvum @ 2020-08-27 18:49:12