The Art of Technical Problem Solving

LeetCode 3612: Process String with Special Operations I – Java StringBuilder Solution Explained

Learn how to solve LeetCode 3612 using StringBuilder, string simulation, reverse operations, duplication logic, dry run examples, complexity analysis, and interview insights.

LeetCode 3838: Weighted Word Mapping – Java Solution Explained with Multiple Approaches

Learn How to Convert Weighted Words into Encoded Characters Using Hashing, Modular Arithmetic, and Optimized Character Mapping

LeetCode 3689: Maximum Total Subarray Value I – Java Greedy Solution Explained

Learn how to solve LeetCode 3689 using an efficient greedy approach in Java. Understand the intuition, dry run, complexity analysis, and why the maximum subarray value can be reused k times for the optimal solution.

LeetCode 2161: Partition Array According to Given Pivot – Java Easy Stable Partition Solution

Learn how to solve LeetCode 2161 Partition Array According to Given Pivot using Java. Includes intuition, stable partition logic, dry run, optimized solution, and time complexity analysis.

LeetCode 2196: Create Binary Tree From Descriptions – Java HashMap & Tree Construction Solution

Learn how to solve LeetCode 2196 Create Binary Tree From Descriptions using Java HashMap and HashSet. Includes intuition, step-by-step explanation, dry run, optimized approach, and complexity analysis.

LeetCode 3751: Total Waviness of Numbers in Range I – Java Solution with Dry Run and Explanation

Learn how to solve LeetCode 3751 Total Waviness of Numbers in Range I using a clean Java brute force approach. Includes intuition, peak and valley logic, dry run, complexity analysis, and interview explanation.

LeetCode 3612: Process String with Special Operations I – Java StringBuilder Solution Explained

Learn how to solve LeetCode 3612 using StringBuilder, string simulation, reverse operations, duplication logic, dry run examples, complexity analysis, and interview insights.

LeetCode 3838: Weighted Word Mapping – Java Solution Explained with Multiple Approaches

Learn How to Convert Weighted Words into Encoded Characters Using Hashing, Modular Arithmetic, and Optimized Character Mapping

LeetCode 3689: Maximum Total Subarray Value I – Java Greedy Solution Explained

Learn how to solve LeetCode 3689 using an efficient greedy approach in Java. Understand the intuition, dry run, complexity analysis, and why the maximum subarray value can be reused k times for the optimal solution.

LeetCode 2161: Partition Array According to Given Pivot – Java Easy Stable Partition Solution

Learn how to solve LeetCode 2161 Partition Array According to Given Pivot using Java. Includes intuition, stable partition logic, dry run, optimized solution, and time complexity analysis.

LeetCode 2196: Create Binary Tree From Descriptions – Java HashMap & Tree Construction Solution

Learn how to solve LeetCode 2196 Create Binary Tree From Descriptions using Java HashMap and HashSet. Includes intuition, step-by-step explanation, dry run, optimized approach, and complexity analysis.

LeetCode 3751: Total Waviness of Numbers in Range I – Java Solution with Dry Run and Explanation

Learn how to solve LeetCode 3751 Total Waviness of Numbers in Range I using a clean Java brute force approach. Includes intuition, peak and valley logic, dry run, complexity analysis, and interview explanation.