DFS-> component

#include <bits/stdc++.h>
using namespace std;
std::vector<int> g[100];
int vis[100];

void dfs(int u)
{
	vis[u] = 1;
	cout<<u<<" ";
	for(int v: g[u]){
		if(!vis[v]){
			dfs(v);
		}
	}
}

int main()
{
	int n,m;
	cin>>n>>m;
	for(int i=0;i<m;i++){
		int a,b;
		cin>>a>>b;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	int component=0;
	for(int i=1;i<n;i++){
		if(!vis[i]){
			dfs(i);
			cout<<endl;
			component++;
		}
	}cout<<endl;
	cout<<component<<endl;

	return 0;
}