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  1. #include <iostream>
  2. using namespace std;
  3. #define MAX_HEIGHT 1000
  4.  
  5. struct Node
  6. {
  7.     int key;
  8.     Node *left, *right;
  9. };
  10.  
  11. Node* newNode(int key)
  12. {
  13.     Node* node = new Node;
  14.     node->key = key;
  15.     node->left = node->right = NULL;
  16.     return (node);
  17. }
  18.  
  19. void kDistantFromLeafUtil(Node* node, int height[], int pathLen, int k)
  20. {
  21.     if (node==NULL) return;
  22.     height[pathLen] =  node->key;
  23.     pathLen--;
  24.  
  25. if(node->left == NULL && node->right == NULL){
  26.     cout <<"For Node "<<node->key <<"K distance node is= "<< height[pathLen+k+1] << " "<<endl;
  27.     return;
  28. }
  29.     kDistantFromLeafUtil(node->left, height,  pathLen, k);
  30.     kDistantFromLeafUtil(node->right, height,  pathLen, k);
  31. }
  32.  
  33. void printKDistantfromLeaf(Node* node, int k)
  34. {
  35.     int height[MAX_HEIGHT];
  36.     bool visited[MAX_HEIGHT] = {false};
  37.     kDistantFromLeafUtil(node, height, 1000, k);
  38. }
  39.  
  40. int main()
  41. {
  42.     Node * root = newNode(1);
  43.     root->left = newNode(2);
  44.     root->right = newNode(3);
  45.     root->left->left = newNode(4);
  46.     root->left->right = newNode(5);
  47.     root->right->left = newNode(6);
  48.     root->right->right = newNode(7);
  49.     root->left->left->right = newNode(8);
  50.     cout << "Nodes at distance 2 are: "<<endl;
  51.     printKDistantfromLeaf(root, 2);
  52.  
  53.     return 0;
  54. }
Success #stdin #stdout 0s 3428KB
comments (?)
stdin 
Standard input is empty
stdout 
Nodes at distance 2 are: 
For Node 8K distance node is= 2 
For Node 5K distance node is= 1 
For Node 6K distance node is= 1 
For Node 7K distance node is= 1
https://ideone.com/htifVi
node at K distance
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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