#leetcode Development Tutorials & Tips | Roast Dev

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Breaking the LeetCode Loop: How Goodhart’s Law Exposes the Pitfalls of Mindless Coding Grinds

Introduction: The Coding Olympiad Obsession Walk into any computer science department today, and you’ll hear the same refrain: “How many LeetCode problems have you solved this week?” Undergradua...

22.03.2025 0 Read More

2685. Count the Number of Complete Components

2685. Count the Number of Complete ComponentsDifficulty: MediumTopics: Depth-First Search, Breadth-First Search, Union Find, GraphYou are given an integer n. There is an undirected graph with n vertic...

22.03.2025 0 Read More

1976. Number of Ways to Arrive at Destination

1976. Number of Ways to Arrive at DestinationDifficulty: MediumTopics: Dynamic Programming, Graph, Topological Sort, Shortest PathYou are in a city that consists of n intersections numbered from 0 to ...

23.03.2025 0 Read More

Leetcode - 138. Copy List with Random Pointer

Copy List with Random Pointer – JavaScript Approach Problem Statement You are given a linked list where each node contains an additional random pointer that can point to any node i...

24.03.2025 0 Read More

3169. Count Days Without Meetings

3169. Count Days Without MeetingsDifficulty: MediumTopics: Array, SortingYou are given a positive integer days representing the total number of days an employee is available for work (starting from da...

24.03.2025 0 Read More

3394. Check if Grid can be Cut into Sections

3394. Check if Grid can be Cut into SectionsDifficulty: MediumTopics: Array, SortingYou are given an integer n representing the dimensions of an n x n grid, with the origin at the bottom-left corner o...

25.03.2025 0 Read More

2033. Minimum Operations to Make a Uni-Value Grid

2033. Minimum Operations to Make a Uni-Value GridDifficulty: MediumTopics: Array, Math, Sorting, MatrixYou are given a 2D integer grid of size m x n and an integer x. In one operation, you can add x t...

26.03.2025 0 Read More

2780. Minimum Index of a Valid Split

2780. Minimum Index of a Valid SplitDifficulty: MediumTopics: Array, Hash Table, SortingAn element x of an integer array arr of length m is dominant if more than half the elements of arr have a value ...

27.03.2025 0 Read More

2503. Maximum Number of Points From Grid Queries

2503. Maximum Number of Points From Grid QueriesDifficulty: HardTopics: Array, Two Pointers, Breadth-First Search, Union Find, Sorting, Heap (Priority Queue), MatrixYou are given an m x n integer matr...

28.03.2025 0 Read More

🔁 1128. Number of Equivalent Domino Pairs – Explained with Code in C++, JavaScript, and Python

If you’ve ever played with dominoes, you know that the order of the numbers doesn’t matter—[1,2] is the same as [2,1]. That's the central idea behind this popular LeetCode problem: 💡 Given a ...

04.05.2025 0 Read More