How do I print a binary tree in spiral order?

How do I print a binary tree in spiral order?

Approach:

1. Start from the first row from left to right and print elements.
2. Then traverse the last row from right to left and print elements.
3. Again traverse the second row from left to right and print.
4. Then second last row from right to left and so on and repeat the steps until the complete 2-D array is traversed.

How do you print a binary tree boundary?

We break the problem in 3 parts:

1. Print the left boundary in top-down manner.
2. Print all leaf nodes from left to right, which can again be sub-divided into two sub-parts: ….. 2.1 Print all leaf nodes of left sub-tree from left to right. …..
3. Print the right boundary in bottom-up manner.

Where is leaf node in binary tree?

Printing leaf nodes of binary tree using Iteration

1. Create a Stack and push the root node.
2. loop until Stack is not empty.
3. Call Stack.pop() to get the last element and store its left and right child if they are not null.
4. if both left and right child of the last node is null then it’s a leaf node, print its value.

How to print a binary tree in vertical order?

Given a binary tree, print it vertically. The following example illustrates vertical order traversal. Recommended: Please solve it on “ PRACTICE ” first, before moving on to the solution. The idea is to traverse the tree once and get the minimum and maximum horizontal distance with respect to root.

Can a vertical line be printed in the same order?

Since the above approach uses preorder traversal, nodes in a vertical line may not be printed in the same order as they appear in the tree. For example, the above solution prints 12 before 9 in the below tree.

What’s the minimum horizontal distance for a binary tree?

Recommended: Please solve it on “ PRACTICE ” first, before moving on to the solution. The idea is to traverse the tree once and get the minimum and maximum horizontal distance with respect to root. For the tree shown above, minimum distance is -2 (for node with value 4) and maximum distance is 3 (For node with value 9).

How to calculate vertical order of a tree?

Distance means the vertical distance of any node in the tree from the root node, we get numbers as a distance, as a left subtree we get negative numbers and for the right subtrees we get positive numbers and for the right and nodes below of the root is considered to at 0 distance from the root, which we pass as our arguments recursively.