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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. vector<int> adj[100001];
  4. bool visited[100001];
  5. int ans[100001];
  6. void bfs()
  7. {
  8. 	queue<pair<int,int> > q;
  9. 	//pair<int,int> p = make_pair(1,1);
  10. 	ans[1] = 1;
  11. 	q.push({1,1});
  12. 	while(!q.empty())
  13. 	{
  14. 		pair<int,int> p = q.front();
  15. 		q.pop();
  16. 		visited[p.first] = true;
  17. 		ans[p.first] = p.second;
  18. 		for(int i=0;i<adj[p.first].size();i++)
  19. 		{
  20. 			p = make_pair(adj[p.first][i],p.first);
  21. 			if(visited[p.first] == false)
  22. 				q.push(p);
  23. 		}
  24. 	}
  25. }
  26. int main()
  27. {
  28. 	memset(visited,false,sizeof(visited));
  29. 	memset(ans,0,sizeof(ans));
  30. 	int nodes,edges;
  31. 	cin >> nodes >> edges;
  32. 	for(int i=0;i<edges;i++)
  33. 	{
  34. 		int u,v;
  35. 		cin >> u >> v;
  36. 		adj[u].push_back(v);
  37. 		adj[v].push_back(u);
  38. 	}
  39. 	bfs();
  40. 	cout << "Yes\n";
  41. 	for(int i=2;i<=nodes;i++)
  42. 		cout << ans[i] << "\n";
  43. }
  44.  
Success #stdin #stdout 0s 6392KB
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Yes
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https://ideone.com/As4HWt
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
secret

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