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1523. Count Odd Numbers in an Interval Range
Problem Description Given two non‑negative integers low and high, return the count of odd numbers between low and high inclusive. Example 1 Input: low = 3, hig...
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Why My LeetCode Solution Passes Some Test Cases But Fails Others
Your code works for the sample inputs but fails on hidden test cases. Learn the systematic debugging process to identify edge cases, logical errors, and constra...
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Advent of Code 2025 - Day 6
Check out my full solution for day 6 on GitHub. Part one The first part gives us a few rows of numbers and a last line with operations that are either addition...
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3578. Count Partitions With Max-Min Difference at Most K
Problem You are given an integer array nums and an integer k. Partition nums into one or more non‑empty contiguous segments such that in each segment the diffe...
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Day 56: Python Fibonacci nth Term – Blazing Fast O(n) Iterative Solution with O(1) Space (No Recursion!)
Overview Welcome to Day 56 of the 80DaysOfChallenges journey! This intermediate challenge presents the most efficient way to compute the n‑th Fibonacci number...
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Tetris for Logistics: solving the 3D Bin Packing Problem with Rust 🦀
Introduction You know what’s frustrating? Opening a huge delivery box just to find a tiny item rattling around inside, surrounded by a mountain of bubble wrap....
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Coding Challenge Practice - Question 71
Problem Statement Find the elements that exist in both arrays, given two sorted arrays. Approach Because the arrays are sorted, we can walk through them simult...
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The Machine Learning “Advent Calendar” Day 4: k-Means in Excel
How to implement a training algorithm that finally looks like “real” machine learning The post The Machine Learning “Advent Calendar” Day 4: k-Means in Excel ap...
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Challenge no. 6 - Sea Scape Nihil
DEV Community !DEV Community Logohttps://media2.dev.to/dynamic/image/width=65,height=,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.a...
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Understanding ECDSA
This article is basically an exercise in understanding ECDSA Elliptic Curve Digital Signature Algorithm from scratch. All I assume is some basic math and a will...
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PWC 350 Good Substring / Shuffle Pairs
The movie version of Wicked is in theaters right now, so I’m reminded of the song For Goodhttps://www.youtube.com/watch?v=Y8YMfgu92hQ Broadway version. It’s rel...
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Coding Challenge Practice - Question 69
Problem Description Create a function that returns the n-th term of the “look‑and‑say” sequence as a string. The sequence starts with '1' for n = 1. Each sub...