Revise paste Untitled

#include <iostream>
#include <vector>
#include <stack>
using namespace std;
const int maxn = 1e5 + 10;
vector<int> graph[maxn];
int discovarable_time[maxn];
int low_link[maxn];
bool on_stack[maxn];
int current_time = 0;
int n;

void dfs(int node, int parent) {
    on_stack[node] = true;
    low_link[node] = current_time;
    discovarable_time[node] = current_time;
    current_time++;
    
    int root = 0;
    for(int i = 0; i < (int) graph[node].size(); i++) {
        int neighbour = graph[node][i];
        if(neighbour != parent) {
            if(on_stack[neighbour]) {
                low_link[node] = min(low_link[node], discovarable_time[neighbour]);
            }
            else {
                dfs(neighbour, node);
                low_link[node] = min(low_link[node], low_link[neighbour]);
                if(parent != -1 and low_link[neighbour] >= discovarable_time[node]) {
                    cout << "articulation point: " << node + 1 << endl;
                }
                root++;
            }
        }
    }
    if(root > 1 and parent == -1) {
        cout << "articulation point: " << node + 1 << endl;
    }
}
void art_points() {
    for(int i = 0; i < maxn; i++) {
        discovarable_time[i] = -1;
        on_stack[i] = false;
        low_link[i] = -1;
    }
    for(int i = 0; i < n; i++) {
        if(!on_stack[i]) {
            dfs(i, -1);
            
        }
    }
}
int main() {
    int  m;
    cin >> n >> m;
    
    for(int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        a--; b--;
        graph[a].push_back(b);
        graph[b].push_back(a);
    }
    
    art_points();
    return 0;
}