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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. struct node
  6. {
  7. 	int id;
  8. 	node* next;
  9.  
  10. 	node(int i, node* n) { id =i , next = n; }
  11. } *Start[100005] , *End[100005];
  12.  
  13. int main()
  14. {
  15. 	int n,q;
  16.  
  17. 	cin>>n>>q;
  18. 	for (int i=1 ; i<=n ; i++) { Start[i] = End[i] = new node(i,NULL); }
  19.  
  20. 	for (int i=1 ; i<=q ; i++)
  21. 	{
  22. 		int s,t;
  23. 		cin>>s>>t;
  24. 		End[s]->next = Start[t];
  25. 		Start[t] = Start[s];
  26. 		if (End[t]==NULL) End[t] = End[s];
  27. 		Start[s] = End[s] = NULL;
  28. 	}
  29.  
  30. 	int a[100005];
  31. 	for (int i=1 ; i<=n ; i++)
  32. 	{
  33. 		node* p = Start[i];
  34. 		while (p) a[p->id] = i , p = p->next;
  35. 	}
  36.  
  37. 	for (int i=1 ; i<=n ; i++) cout<<a[i]<<" ";
  38.  
  39. 	return 0;
  40. }
Success #stdin #stdout 0s 4504KB
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https://ideone.com/fQ7DjM
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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