//這個是內網比賽的代碼，用到了無向圖的雙連通分量?，gabow部分是求雙聯通的

#include
#include
#include
using?namespace?std;
vector?tmp1[5005];
set?tmp2[5005];

int?bcc[5005];?
int?pre[5005];?
int?path[5005];
int?sath[5005];
int?nm;
int?ps;
int?now;
int?ans;?

void?dfs（int?fuint?num）
{
????path[p++]=num;
????sath[s++]=num;
????pre[num]=now++;
????for（int?i=0;i????{
????????if?（?tmp1[num][i]?==?fu?）
????????????continue?;
????????if?（?pre[tmp1[num][i]]?==?-1?）
????????????dfs（numtmp1[num][i]）?;
????????else?
????????{
????????????while?（?pre[tmp1[num][i]]?????????????????p--?;
????????}
????}
????if（path[p-1]!=num）
????????return?;
????p--;
????while（sath[s]!=num）
????{
????????bcc[sath[s-1]]=ans;
????????