Rotate Image LeetCode Solution
You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise).
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Leetcode SolutionGroup Anagrams LeetCode Solution
Given an array of strings strs, group the anagrams together. You can return the answer in any order.
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Leetcode SolutionPow x n LeetCode Solution
Implement pow(x, n), which calculates x raised to the power n.
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Leetcode SolutionMin Stack LeetCode Solution
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.
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Leetcode SolutionFind First and Last Position of Element in Sorted Array LeetCode Solution
Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value. If target is not found in the array, return [-1, -1].
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Leetcode Solution
What is Depth First Search and how they works?
This article explores Depth First Search, its recursive and iterative implementations, and its time complexity, and provides code examples in Python and JavaScript. 1. What is Depth First Search? Depth First Search (DPS) is a graph traversal algorithm that explores as far as possible along each branch before backtracking. It uses a stack-based approach, either
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Algorithm
What is Breadth First Search & how they works?
This article explores the Breadth First Search, its implementation in different programming languages, and its runtime complexities. 1. Graph Traversals Graph traversal means visiting every vertex and edge exactly once in a well-defined order. During a traversal, you must track which vertices have been visited. The most common way of tracking vertices is to mark
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Algorithm
What are Graph Algorithms?
This article explores graph algorithms and the different types, applications, and uses of these powerful tools. 1. What is a Graph? A Graph is a flow structure that represents the relationship between various objects. In other words, A graph is a pair (V, E) where V is the number of vertices and E is the
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Algorithm
What are Dynamic Programming Problems?
This article explores Dynamic Programming Problems, the top-down and bottom-up approaches, their differences with recursion, and some classic examples like Fibonacci and Longest Increasing Subsequence. 1. What are Dynamic Programming Problems? Dynamic Programming is a powerful technique to solve a complicated problem by breaking it down into simpler subproblems. It can be solved by breaking
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Algorithm
How Greedy Algorithm Works?
This article explores greedy algorithms, how greedy algorithm works, their applications, and how they compare to other algorithms like dynamic programming. 1. What is a Greedy Algorithm? A Greedy Algorithm is a simple, intuitive algorithm used in optimization problems. It is designed to achieve the optimum solution for a given problem. This algorithm builds up
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Algorithm
What are Divide and Conquer Algorithm Problems?
This article explores the Divide and Conquer Algorithm Problems, their applications, advantages, and some of the most common problems solved using this technique. 1. What are Divide and Conquer Algorithm Problems? Divide and Conquer is an important algorithm design technique based on recursion. Some problems failed to provide optimal solutions. Among those problems, some are
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Algorithm
What is Shell Sort Algorithm and how does it works?
This article explores the Shell Sort Algorithm, how it works, its pseudocode, implementations in C++ and Python, time complexity, advantages, and disadvantages. 1. What is the Shell Sort Algorithm? The Shell Sort Algorithm is also called diminishing increment sort. It is a highly efficient sorting technique and serves as an enhancement of insertion sort. It
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Algorithm
What is the Bucket Sort Algorithm and how does it works?
This article explores the Bucket Sort Algorithm, how the Bucket Sort Algorithm works, its pseudocode, time complexity, and implementation in Python. 1. What is the Bucket Sort Algorithm? Bucket Sort Algorithm is a comparison sort algorithm. Like Counting sort, Bucket Sort also imposes restrictions on the input to improve the performance. The Bucket Sort Algorithm
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Algorithm
What is the Heap Sort Algorithm and how does it works?
This article explores the Heap Sort Algorithm, how it works, pseudocode, implementation in C++, and a comparison with sorted lists in Python. 1. What is the Heap Sort Algorithm? The Heap Sort Algorithm is a comparison-based sorting algorithm. This sorting algorithm has a more favorable worst-case O(n log n) runtime. Heap Sort is an in-place
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Algorithm
What is the Radix Sort Algorithm and how does it works?
This article explores the Radix Sort Algorithm, its pseudo code, and how to implement Radix Sort in Python. 1. What is the Radix Sort Algorithm? Like Counting and Bucket Sort, the Radix Sort Algorithm is a linear sorting algorithm. The Radix Sort Algorithm is a non-comparative sorting algorithm that sorts numbers by processing individual digits. It
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Algorithm