BinaryTree<T>* BinaryTree<T>::createMinimalBST(T array[], int start, int end) {
if (end < start)
return 0;
int mid = (start + end) / 2;
BinaryTree<T>* pNode = new BinaryTree<T>(array[mid]);
pNode->left = createMinimalBST(array, start, mid - 1);
pNode->right = createMinimalBST(array, mid + 1, end);
return pNode;
}
template <class T> TreeNode<T>* TreeNode<T>::createMinimalBST(T* const arr, int start, int end){
if (start > end) {
return NULL;
}
int midIndex = (start + end) / 2;
int midValue = arr[midIndex];
TreeNode<T> *root = new TreeNode<T>(midValue);
root->left = createMinimalBST(arr, start, midIndex - 1);
root->right = createMinimalBST(arr, midIndex + 1, end);
return root;
}
int main()
{
#if 0
int a[] = {2, 4, 1, 8, 3, 5, 9, 6, 7};
tree_t root = NULL;
for(int i = 0; i < 9; ++i)
{
root = insert(root,a[i]);
}
display(root);
printf("----------------------\n");
#endif
#if 0
printf("In-order traversal \n");
display(root);
printf("No of nodes: %d\n", count(root));
printf("----------------------\n");
printf("No of leaf nodes: %d\n",count_leaf(root));
printf("----------------------\n");
printf("Pre-order traversal\n");
post_traversal(root);
printf("----------------------\n");
printf("Post-order traversal\n");
pre_traversal(root);
printf("----------------------\n");
printf("Height of the tree is: %d\n", height(root));
printf("Least value in tree is: %d\n", least_of_tree(root));
printf("Max value of tree is: %d\n", max_of_tree(root));
int height_ = height(root);
int vertical_sum[10000];
for(int i = 0; i < 10000; ++i)
{
vertical_sum[i] = 0;
}
/*
I assumed Vertical sum for root is 1... :P if there are more no of nodes on the
left subtree of the root..they we cant implement this using arrays in c..as negative indices is not possible
*/
verticalSumArray(root,vertical_sum,1);
for(int i = 0;vertical_sum[i] != 0 ; ++i)
{
printf("%d : %d \n",i,vertical_sum[i]);
}
// tree_t mirrored_root = mirror_tree(root);
printf("----------------------\n");
// display(mirrored_root);
//printf("%d\n", RLMirrors(root));
//inorder(root);
tree_t largest = largestSumSubtree(root);
printf("%d\n",largest -> key);
int key = 1;
if(search(root,key) != NULL)
{
printf("%d is present\n",key);
}
else
{
printf("%d is absent\n",key);
}
iterativeInorder(root);
printf("----------------------\n");
iterativePreorder(root);
printf("----------------------\n");
iterativePostorder(root);
levelorder(root);
int height = 0;
printf("the diameter of the tree: %d\n",diameter(root));
int key = 9;
printAncestorsI(root,key);
int k = 3;
printKdistance(root,k);
int sum = 36;
if(hasSumPath(root,sum) == 1)
{
printf("Yes\n");
}
else
{
printf("No\n");
}
root = getNode(10);
root -> llink = getNode(8);
root -> rlink = getNode(2);
root -> llink -> llink = getNode(3);
root -> llink -> rlink = getNode(5);
root -> rlink ->rlink = getNode(2);
display(root);
printf("----------------------\n");
if(isSum(root))
{
printf("Yes\n");
}
else
{
printf("No\n");
}
root = getNode(20);
root -> llink = getNode(8);
root -> rlink = getNode(22);
root -> llink -> llink = getNode(4);
root -> llink -> rlink = getNode(12);
root -> llink -> rlink -> rlink = getNode(14);
root -> llink -> rlink -> llink = getNode(10);
int n1 = 4;
int n2 = 14;
printf("Least common ancestor of %d & %d is %d \n", n1,n2,lowestCommonAncestor(root,n1,n2));
printf("\n");
#endif
// printPaths(root);
#if 0
int num = 4;
printf("The no of bst for %d keys is %d\n", num,countTrees(num));i
#endif
#if 0
root = getNode(20);
root -> llink = getNode(8);
root -> rlink = getNode(22);
root -> llink -> llink = getNode(4);
root -> llink -> rlink = getNode(12);
root -> llink -> rlink -> llink = getNode(10);
root -> llink -> rlink -> rlink = getNode(14);
tree_t successor = inorderSuccessor(root,root -> llink);
if(successor != NULL)
{
printf("thei inorder successor is %d\n",successor -> key);
}
#endif
#if 0
root = getNode(20);
root -> llink = getNode(8);
root -> rlink = getNode(22);
root -> llink -> llink = getNode(100);
if(checkAllLeavesSameLevel(root) == 1)
{
printf("All the leaves are in the same level\n");
}
#endif
#if 0
display(root);
printf("-------------------------------------\n");
replaceNodeWithSum(root,0);
display(root);
int getSum(tree_t root)
{
if(root == NULL)
{
return 0;
}
else
{
return root -> key + getSum(root -> rlink);
}
}
#endif
// printf("%d\n",countTrees(3));
#if 0
root = getNode(10);
root->llink = getNode(20);
root->rlink = getNode(30);
if(isBalanced(root) == 1)
{
printf("The tree is balanced\n");
}
else
{
printf("Ther tree is unbalanced\n");
}
#endif
#if 0
tree_t root = NULL;
int array[] = {1,2,3,4,5,6,7,8,9};
int n = 9;
root = createMinimalBST(root,array,n);
display(root);
#endif
// tree_t root = NULL;
#if 0
root = getNode(20);
root -> llink = getNode(8);
root -> rlink = getNode(22);
root -> llink -> llink = getNode(4);
root -> llink -> rlink = getNode(12);
root -> llink -> rlink -> llink = getNode(10);
root -> llink -> rlink -> rlink = getNode(14);
// printPathWithSum(root,40);
// levelorderRecursive(root);
// rightView(root);
#endif
#if 0
int inorder[] = {4, 2, 5, 1, 6, 3};
int preorder[] = {1, 2, 4, 5, 3, 6};
int n = 6;
// int preIndex = 0;
// root = buildTreeWithInorderAndPreOrder(inorder,preorder,0,n - 1,&preIndex);
// display(root);
int index = 0;
printPostOrder(inorder,preorder,0,n - 1,&index);
#endif
#if 0
/*
10
-2 7
8 -4
*/
tree_t root = NULL;
root = getNode(10);
root->llink = getNode(-2);
root->rlink = getNode(7);
root->llink->llink = getNode(8);
root->llink->rlink = getNode(-4);
// printf("Sum: %d\n",maxSumPath(root));
pre_traversal(root);
printf("----------------------------------");
display(root);
#endif
return 0;
}