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  1. #include <iostream>
  2. #include <vector>
  3. #include <array>
  4.  
  5. struct Node 
  6. {
  7. 	int key;
  8. 	std::vector<Node> children;
  9. //	Node() { key = -1; } // root
  10. 	Node(int k)
  11. 	{
  12. 		key = k;
  13. 	}
  14.  
  15. 	void Add(Node n)
  16. 	{
  17. 		children.push_back(n);
  18. 	}
  19.  
  20. 	void display()
  21. 	{
  22. 		std::cout << "My value is " << key << std::endl;
  23. 		std::cout << "My " << children.size()  << " kid(s) are : " << std::endl;
  24. 		for( auto n : children)
  25. 		{
  26. 			n.display();
  27. 		}
  28. 	}
  29.  
  30. };
  31.  
  32. int main()
  33. {
  34. 	constexpr int numNode = 5; // for 
  35. 	std::array<int, numNode> numbers = { 4, -1, 4, 1, 1 }; 
  36. 	std::vector<Node> nodesStorage;
  37.  
  38. 	for (int i = 0 ; i < numNode ; i++)
  39. 	{
  40. 		nodesStorage.push_back(Node(i));
  41. 	}
  42. 	nodesStorage.push_back(Node(-1)); 
  43.  
  44. 	for (int i = 0 ; i< numNode ; i++)
  45. 	{
  46. 		if(numbers[i] == -1) // the root
  47. 		{
  48. 			nodesStorage[numNode].Add(nodesStorage[i]);
  49. 		}
  50. 		else
  51. 		{
  52. 			nodesStorage[numbers[i]].Add(nodesStorage[i]);
  53. 		}
  54. 	}
  55.  
  56. 	nodesStorage[1].display();
  57. 	nodesStorage[numNode].display();
  58.  
  59. 	return 0;
  60.  
  61. }
  62.  
  63.  
  64.  
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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My value is 1
My 2 kid(s) are : 
My value is 3
My 0 kid(s) are : 
My value is 4
My 2 kid(s) are : 
My value is 0
My 0 kid(s) are : 
My value is 2
My 0 kid(s) are : 
My value is -1
My 1 kid(s) are : 
My value is 1
My 0 kid(s) are :
https://ideone.com/NCyRsx
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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