```cpp for(long long ii=0;ii<=20;ii++){ if(fa[x][ii]==fa[y][ii]){ num=min(num,min(w[x][ii],w[y][ii])); return lca(fa[x][ii],fa[y][ii],num); } } ``` 有问题，此贴终结 by douweiqi @ 2024-02-19 20:51:29