Beautiful Days at the Movies | Hackerrank Solutions
Lily likes to play games with integers. She has created a new game where she determines the difference between a number and its reverse. For instance, given the number 12,…
What is Stacking of Models in Machine Learning?
The last Ensemble method we will discuss in this series is called stacking (short for stacked generalization). It is based on a simple idea: instead of using trivial functions (such…
Finding the Top K Most Frequent Elements in an Array
Finding the top ( k ) most frequent elements in an array is a common question in coding interviews and a useful task in various applications like data analysis and…
Finding the Top K Largest Elements in an Array
In many coding interviews and real-world applications, finding the top ( k ) largest elements in an array is a common problem. This tutorial will guide you through three popular…
Level Order Traversal Technique for Binary Trees
Introduction: In binary trees, exploring their structure and nodes in a systematic manner is crucial for various operations and analyses. One such traversal method is the level order traversal, which…
Minimum Steps to Reduce a Number to 1 Using Dynamic Programming
Problem Statement: Given a positive integer ‘N’, our objective is to compute and return the minimum number of steps needed to reduce ‘N’ to 1. We have three permissible operations:…
Maximum Subarray Sum Challenge with Kadane’s Algorithm
Introduction: In the realm of algorithmic problem-solving, the quest for the maximum sum of any contiguous subarray within a given array is a classic challenge. In this tutorial, we’ll embark…
Finding the Longest Palindromic Subsequence
Introduction: Dynamic Programming (DP) is a powerful algorithmic technique used to solve a variety of optimization problems. One classic problem where DP shines is in finding the longest palindromic subsequence…
Check If The String Is A Palindrome
You are given a string ‘S’. Your task is to check whether the string is palindrome or not. For checking palindrome, consider alphabets and numbers only and ignore the symbols…
Managing Data from Relational Databases using Python
Databases vary widely, with relational databases being predominant due to their efficient data structuring and retrieval. SQL simplifies data manipulation across different DBMSs. Python's sqlalchemy facilitates database connections, allowing data…
Introduction to Dimensionality Reduction
The text discusses the curse of dimensionality in machine learning, highlighting challenges in high-dimensional spaces. It suggests reducing features to improve training efficiency and visualization, while addressing potential information loss…
Sending Data in Unstructured File Form
Unstructured data files consist of a series of bits. The file doesn’t separate the bits from each other in any way. You can’t simply look into the file and see…
Random Forests | Machine Learning from Scratch
As we have discussed, a Random Forest is an ensemble of Decision Trees, generally trained via the bagging method (or sometimes pasting), typically with max_samples set to the size of…
Accessing Data in Structured Flat-File Form
In many cases, the data you need to work with won’t appear within a library, such as the toy datasets in the Scikit-learn library. Real-world data usually appears in a…
Utopian Tree | Hackerrank Solution
The Utopian Tree goes through 2 cycles of growth every year. Each spring, it doubles in height. Each summer, its height increases by 1 meter. A Utopian Tree sapling with…
Game with String | Problem of the day
Given a string s of lowercase alphabets and a number k, the task is to print the minimum value of the string after removal of k characters. The value of…
The Hurdle Race | Hackerrank
A video player plays a game in which the character competes in a hurdle race. Hurdles are of varying heights, and the characters have a maximum height they can jump.…
Gini Impurity or Entropy? How to decide the root node in decision tree?
By default, the Gini impurity measure is used, but you can select the entropy impurity measure instead by setting the criterion hyperparameter to “entropy”. The concept of entropy originated in…
How can A linear model learn non-linear/discrete patterns?
Introduction During model development, one of the techniques that many don’t experiment with is feature discretization. The core idea is to transform a continuous feature into discrete features, mostly one-hot…
Pyspark Tutorial for beginners
PySpark, it is a Python library for Apache Spark, an open-source distributed computing system. PySpark allows you to write Spark applications using Python programming language, providing a Python API for…