@[_O_v_O_](/user/782941) merge 的`ls(x)=merge(x,ls(y));pushup(y);return y;`应该是`ls(y)` 吧。
by __zaa__ @ 2024-04-19 10:28:14
@[__zaa__](/user/716965) thx，已关
by _O_v_O_ @ 2024-04-19 10:32:51