Introduction The Reverse Words in a String problem is a classic string manipulation challenge that appears frequently in coding interviews and is part of the LeetCode 75 study plan. Given a string s, reverse the order of the words in the string. Example 1: Example 2: Constraints: Python Solution for Reverse Words in a String … Read more
Introduction The Reverse Vowels of a String problem is a popular string manipulation challenge that tests your ability to selectively modify characters within a string. Given a string s, the task is to reverse only the vowels—both lowercase (a, e, i, o, u) and uppercase (A, E, I, O, U)—while keeping all non-vowel characters in … Read more
Introduction The Can Place Flowers problem is a classic greedy algorithm challenge frequently featured in coding interviews and study plans like LeetCode 75. In this problem, you’re given a binary list called flowerbed where 0 represents an empty plot and 1 represents a plot with a flower already planted. Along with this, you’re given an … Read more
Introduction You are given an integer array candies where each element represents the number of candies a particular child has. You are also given an integer extraCandies which represents the number of extra candies you can give to any one child. Your task is to determine for each child if they can have the greatest … Read more
Introduction The Greatest Common Divisor of Strings problem is a fascinating blend of string manipulation and mathematical logic, commonly featured in coding interviews and the LeetCode 75 study plan. In this challenge, you’re given two non-empty strings, str1 and str2, and your task is to find the largest string x such that both str1 and … Read more
The Merge Strings Alternately problem is a simple yet elegant string manipulation task often featured in beginner-level coding challenges and interview warmups. Given two input strings, word1 and word2, your goal is to merge them character by character in alternating order starting with the first character of word1, followed by the first character of word2, … Read more
XGBoost or Extreme Gradient Boosting is a highly efficient and scalable implementation of the gradient boosting framework. Developed by Tianqi Chen and used in many winning Kaggle machine learning competitions, it has become a go-to model for structured/tabular datasets due to its high performance, flexibility and built-in regularization capabilities. What is Boosting? Before understanding XGBoost, … Read more
Lasso Regression is one of the most powerful techniques in machine learning and statistics for regression analysis. It is especially useful when you have a large number of features and want to identify the most important ones. What is Regression? Before diving into Lasso Regression, let’s briefly understand what regression means. In simple words, regression … Read more
Introduction The Naive Bayes algorithm is a simple yet powerful classification technique based on Bayes’ Theorem with a strong assumption of feature independence. It is especially popular in text classification, spam detection, and sentiment analysis because of its high speed and decent accuracy even on relatively small datasets. This article dives deep into: What Is … Read more
Introduction to KNN The K-Nearest Neighbors in sklearn is one of the most straightforward and effective algorithms in machine learning. It belongs to the supervised learning category, meaning it requires labeled data to learn from. It’s commonly used for: Despite its simplicity, KNN in sklearn is surprisingly powerful and is often used as a baseline … Read more
If you’re just starting out with machine learning or statistics, you might already know about linear regression, a method used to predict continuous outcomes based on input features. But real-world data is often tricky. When features are closely related or there are too many, linear regression may struggle to make reliable predictions. That’s where Ridge … Read more