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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. class heap{
  4. 	public:
  5. 	int arr[100];
  6. 	int size=0;
  7. 	void insert(int value){
  8. 		size++;
  9. 		arr[size]=value;
  10. 		int i=size;
  11. 		while(i>1){
  12. 			int parent=i/2;
  13. 			if(arr[parent]<arr[i]){
  14. 				swap(arr[parent],arr[i]);
  15. 				i=parent;
  16. 			}
  17. 			else return ;
  18. 		}
  19. 	}
  20.  
  21. 	void print(){
  22. 		for(int i=0;i<=size;i++){
  23. 			cout<<arr[i]<<" ";
  24. 		}
  25. 		cout<<endl;
  26. 	}
  27.  
  28. 	void del(){
  29. 		if(size==0){
  30. 			cout<<"No elements to delete";
  31. 			return ;
  32. 		}
  33. 		arr[1]=arr[size];
  34. 		size--;
  35. 		int i=1;
  36. 		while(i<size){
  37. 			int leftnode=2*i;
  38. 			int rightnode=2*i+1;
  39. 			if(i<size&&arr[i]<arr[leftnode]){
  40. 				swap(arr[i],arr[leftnode]);
  41. 				i=leftnode;
  42.  
  43. 			}
  44. 			else if (i<size&&arr[i]<arr[rightnode]){
  45. 				swap(arr[i],arr[rightnode]);
  46. 				i=rightnode;
  47. 			}
  48. 			else
  49. 			{
  50. 				return;
  51. 			}
  52. 		}
  53. 	}
  54. };
  55. int main() {
  56. 	// your code goes here
  57. 	heap h;
  58. 	h.insert(10);
  59. 	h.insert(20);
  60. 	h.insert(30);
  61. 	h.insert(5);
  62. 	h.insert(29);
  63. 	h.print();
  64. 	h.del();
  65. 	h.print();
  66.  
  67. 	return 0;
  68. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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0 30 29 20 5 10 
0 29 10 20 5
https://ideone.com/VEsJkF
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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