To merge two binary search trees, you can perform an in-order traversal on both trees and merge the resulting sorted arrays. Then, you can construct a new binary search tree from the sorted array using a modified version of the binary search tree creation algorithm. Here’s the general algorithm to merge two binary search trees: … Read more
To check if a binary tree is a binary search tree or not, we can perform an inorder traversal of the tree and check if the resulting sequence is in non-decreasing order. Here’s a Kotlin code implementation of this approach: The isValidBST function takes the root node of a binary tree and returns a boolean … Read more
LCA stands for “Lowest Common Ancestor”. In a binary search tree, the LCA of two nodes is the node that is the lowest common ancestor of both nodes and has the greatest value less than or equal to the values of both nodes. For example, consider the following binary search tree: The LCA of nodes … Read more
To find the minimum and maximum values in a binary search tree, we can simply traverse the tree as follows: Example : Minimum value: 2 And Maximum value: 8 The findMin function starts at the root node and keeps traversing the left child nodes until it reaches a leaf node. It returns the value of … Read more
To delete a node in a binary search tree, we need to perform the following steps: The deleteNode function takes the root of the binary search tree and the key of the node to be deleted as input, and returns the updated root of the binary search tree after the deletion operation. The findSuccessor function … Read more
“Flattening” a linked list refers to the process of converting a nested linked list into a single-level linked list. A nested linked list is a linked list where the nodes can contain references to other linked lists. For example, consider the following nested linked list: 1 -> 2 -> 3 -> 4 -> 5 | … Read more
To sort a linked list containing only 0’s, 1’s, and 2’s, you can use the Dutch national flag algorithm, which is an efficient algorithm that sorts an array containing three distinct values in linear time. Here are the steps to implement this algorithm for a linked list: this implementation, we first traverse the list and … Read more
To merge K sorted linked lists, you can use the “merge K lists” algorithm, which is a variant of the merge sort algorithm. Here’s an algorithm to merge K sorted linked lists: And here’s an algorithm to merge two sorted linked lists: And here’s an implementation of the “merge K lists” algorithm in Kotlin: You … Read more
Implementing quicksort on a linked list is a bit tricky as compared to an array because we can’t easily access elements by index. In quicksort, we need to partition the list into two sub-lists around a pivot element and then recursively sort those sub-lists. Here’s how we can implement quicksort on a linked list: In … Read more
If the array has an odd number of elements, then the median is simply the middle element of the sorted array. If the array has an even number of elements, then the median is the average of the two middle elements of the sorted array. Here is a sample Kotlin code to find the median … Read more
