#include<bits/stdc++.h>
using namespace std;
#define rd(i,n) for(int i=0;i<n;i++)
#define rp(i,n) for(int i=1;i<=n;i++)
#define rep(i,a,b) for(int i=a;i<=b;i++)
#define per(i,a,b) for(int i=b;i>=a;i--)
#define st string
#define vt vector
#define pb push_back
//#define int long long
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const int N=500005;
int n,m,a[N],b[N],c;
int dfn[N],low[N],ti;
vt<int>G[N];
vt<int>ans;
inline void dfs(int x,int p){
    dfn[x]=low[x]=++ti;
    int cnt=(p!=0);
    bool flag=0;
    for(auto i:G[x])if(j!=p){
        if(!dfn[i]){
            cnt++;
            dfs(i,x);
            low[x]=min(low[x],low[i]);
            if(i&&low[i]>=dfn[x])flag=1;
        }else{
            low[x]=min(low[x],dfn[i]);
        }
    }
    if(cnt>=2)ans.pb(x);
    else if(flag)ans.pb(x);
}
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m;
    rp(i,m){
        cin>>a[i]>>b[i];
        G[a[i]].pb(b[i]);
        G[b[i]].pb(a[i]);
    }
    rp(i,n)if(!dfn[i])dfs(i,0);
    sort(ans.begin(),ans.end());
    ans.erase(unique(ans.begin(),ans.end()),ans.end());
    for(auto i:ans)cout<<i<<endl;

    return 0;
}
//Rain Rain Rain

answer.code: In function ‘void dfs(int, int)’:
answer.code:24:24: error: ‘j’ was not declared in this scope
   24 |     for(auto i:G[x])if(j!=p){
      |                        ^