Datastrucutre

Arrays are a fundamental data structure in programming, used to store collections of values in a single variable. An array is a collection of elements of the same data type, which are stored in contiguous memory locations. In Java, arrays are declared using square brackets, for example: int[] myArray =…

Breadth First Search (BFS) Breadth-first search (BFS) is an algorithm for traversing or searching tree or graph data structures. It starts at the tree root (or some arbitrary node of a graph), and explores all of the neighbor nodes at the present depth before moving on to the nodes at the next depth level.

Medium Given an integer array nums, return the number of subarrays filled with 0. A subarray is a contiguous non-empty sequence of elements within an array. Example 1: Input: nums = [1,3,0,0,2,0,0,4] Output: 6 Explanation: There are 4 occurrences of [0] as a subarray. There are 2 occurrences of [0,0] as a subarray. There…

JavaScript is a dynamic programming language that supports a wide range of data types and data structures. Understanding these concepts is essential for writing efficient and effective JavaScript code. In this article, we’ll dive into the details of data types and data structures in JavaScript, with code examples. Data Types…

The Two Sum problem is a popular coding challenge that involves finding two integers in an array that add up to a given target value. This problem is often used to test a programmer’s problem-solving skills, as it requires an efficient algorithm to find the solution. The Two Sum problem…

The FizzBuzz Algorithm The algorithm is a popular exercise used in programming interviews to assess a candidate’s proficiency in fundamental programming concepts like loops, conditionals, and arithmetic operations. Additionally, it helps evaluate a programmer’s problem-solving abilities, algorithmic reasoning, and proficiency in writing clear, concise, and optimized code. The problem requires…

Trees are a powerful data structure used to represent hierarchical relationships between objects. With a root node at the top and leaves at the bottom, trees consist of nodes that are connected by edges. They are widely used in computer science to represent a variety of data structures, such as…

In JavaScript, an array is a data structure that allows us to store a collection of elements in a specific order. Each element in an array is identified by its index, which is a non-negative integer. Arrays can store elements of any data type, including numbers, strings, objects, and even…

Get all possible subarrays, sum each of them, and then sum the sums There is such an easy way to do this, it blew my mind. The trick is to transpose the subarrays and just turn it into a simple multiplication problem. Here’s the cool method: # Let's list all…