by Quank123Wip @ 2018-10-18 21:44:19
去年刚学OI。。。
by lovewz @ 2018-10-19 13:41:27
re不是run effortlessly(轻易运行）的意思嘛qaq
by sssssszj @ 2018-11-08 16:39:25
@[Esport_P1ayErX](/space/show?uid=73552)
```
struct Node {
int Value, son=-1, vis=false;
} Nodes[maxn<<1];//因为是无向图，所以要开maxn*2条边，<<1就是*2
```
by gold_bread @ 2018-11-08 20:45:36