Find ancestors of a given node in a binary tree
Given a binary tree, find all ancestors of a given node in it.
Tag: Recursive
Print all paths from the root to leaf nodes of a binary tree
Given a binary tree, write an efficient algorithm to print all paths from the root node to every leaf node in it.
Find the Lowest Common Ancestor (LCA) of two nodes in a binary tree
Given a binary tree and two nodes, x and y, find the lowest common ancestor (LCA) of x and y in it. The lowest common ancestor (LCA) of two nodes x and y in a binary tree is the lowest (i.e., deepest) node that has both x and y as descendants, where each node can be a descendant of itself.
Inorder Tree Traversal – Iterative and Recursive
Given a binary tree, write an iterative and recursive solution to traverse the tree using inorder traversal in C++, Java, and Python.
Preorder Tree Traversal – Iterative and Recursive
Given a binary tree, write an iterative and recursive solution to traverse the tree using preorder traversal in C++, Java, and Python.
Postorder Tree Traversal – Iterative and Recursive
Given a binary tree, write an iterative and recursive solution to traverse the tree using postorder traversal in C++, Java, and Python.
Determine if a binary tree can be converted to another by doing any number of swaps of children
Given a binary tree, write an efficient algorithm to determine if it can be converted into another binary tree by doing any number of swaps of its right and left branches.
Convert a binary tree to its mirror
Given a binary tree, write an efficient algorithm to convert the binary tree to its mirror.
Check if a binary tree is symmetric or not
Given a binary tree, write an efficient algorithm to check if it has a symmetric structure or not, i.e., left and right subtree mirror each other.
Find the diameter of a binary tree
Given a binary tree, write an efficient algorithm to compute the diameter of it. Binary tree diameter equals the total number of nodes on the longest path between any two leaves in it.
Determine whether a binary tree is a subtree of another binary tree
Given a binary tree, determine if it is a subtree of another binary tree or not. A subtree of a tree T is a tree consisting of a node in T and all of its descendants in T.
Combinations of words formed by replacing given numbers with corresponding alphabets
Given a set of positive numbers, find all possible combinations of words formed by replacing the continuous digits with the English alphabet’s corresponding character.