🔲 Beginner‑Friendly Guide “Maximum Side Length of a Square” – LeetCode 1292 !Cover image for Beginner‑Friendly Guide ‘Maximum Side Length of a Square’ – LeetC...
Problem Idea Given an array, sort the elements by descending frequency and rebuild the array so that the most frequent elements appear first. Example Input: 1,...
!Cover image for 🧩 Beginner‑Friendly Guide “Largest Magic Square” – LeetCode 1895 C++, Python, JavaScripthttps://media2.dev.to/dynamic/image/width=1000,height=...
Problem Create a function that removes duplicate values from an array in‑place i.e., without allocating a new array. Approach 1. Use a Set seen to keep track o...
Recursion vs. Iteration Recursion is often cleaner to write and easier to read especially for trees, but it comes at a cost: space complexity. - Iteration uses...
Problem Given a string s representing a balanced expression, determine whether it contains any redundant parentheses. A pair of parentheses is redundant if the...
Problem Overview You are given: - Two integers n and m, the numbers of internal horizontal and vertical bars in a grid. - Two arrays, hBars and vBars, listing...
Why My First Approach Was Wrong — and How I Fixed It Problem Clarification Very Important The task is to find the element whose first occurrence index is small...
Problem Summary Identify all elements that appear more than once in an array and report each duplicate only once. Example text Input: 1, 2, 3, 2, 4, 1 Output:...
🧱 Beginner‑Friendly Guide “Maximal Rectangle” – LeetCode 85 C++, Python, JavaScript !Cover image for 🧱 Beginner‑Friendly Guide 'Maximal Rectangle' – LeetCode...
markdown !Cover image for 🧶 Beginner‑Friendly Guide 'Minimum ASCII Delete Sum for Two Strings' – LeetCode 712 C++, Python, JavaScripthttps://media2.dev.to/dyna...
Overview This pattern uses two pointers that start from opposite ends of a data structure array or string and move toward each other. It is mainly used when: -...
