When we start programming then printing different star patterns helps us build our logic and problem-solving skills. One of the easiest and beginner patterns is the hollow rectangle pattern. In this article, we are going to learn how we can print the hollow rectangle pattern using different approaches in Python. ... Read More

In this article, we are going to learn how we can count the total number of nodes in a binary tree in Python, using different approaches. A binary tree is a data structure in which each node can have at most two children. The two children node of a binary ... Read More

In this problem, we are given an array of integers. In the given array, each element occurs two times except one element, which occurs only once. We have to find the number that appears only once. In this article, we are going to learn how we can find the number ... Read More

Rotating an array means shifting the elements of an array in a specific direction while maintaining their relative order. For example, if the array {6, 12, 18, 24, 30} is rotating it left once will result in {12, 18, 24, 30, 6}. In this article, we are given an array ... Read More

We can find the sum of leaf nodes in a binary tree using an iterative and a recursive approach. This problem has many real-life applications, such as analyzing hierarchies, calculating final results in decision trees, or summing final nodes in various kinds of trees used in computer algorithms. In this ... Read More

In this problem, we have to remove certain items from arrays; this removal of array items needs to be done in a recursive manner for nested arrays. Lodash is a popular JavaScript library that helps us achieve this easily. What is lodash? Lodash is a popular JavaScript library used to ... Read More

The calculation of the angle between the hour and minute hands of a clock is a common problem in Logical Reasoning and programming. This calculation is used in various applications, such as analog clock simulations, scheduling software, and time-based animations In this article, we are going to discuss how we ... Read More

In this problem, we are given an array, and we have to replace each element with its rank. The rank of an element is the position of the element when element of the array is arranged in sorted order. In this article, we are going to learn about various approaches ... Read More

A circular linked list is a type of linked list where the last node and first node are the same, forming a loop. There are many real-life applications of splitting a circular linked list into two halves for easier processing, load balancing, or efficient data manipulation. In this article, we ... Read More

Finding the Kth largest element in a 2D matrix where each row and column is sorted is a common problem in computer science. This problem has many real-life applications, such as a ranking system, where we need to find the Kth highest score in a sorted dataset. In this article, ... Read More