The Art of Technical Problem Solving

LeetCode 845: Longest Mountain in Array – Java Solution with Peak Expansion

Learn how to identify mountain peaks, expand in both directions, and find the longest valid mountain subarray using O(n) time and O(1) extra space.

LeetCode 41: First Missing Positive – O(n) Time and O(1) Space Java Solution

A complete explanation of the cyclic placement technique for finding the smallest missing positive integer in an unsorted array.

LeetCode 55: Jump Game – Java Greedy Solution with Explanation and Dry Run

Learn how to solve LeetCode 55 Jump Game using a simple greedy approach by tracking the farthest index reachable at every step.

LeetCode 1189: Maximum Number of Balloons – Java HashMap and Frequency Counting Solution

SEO Subtitle Learn Multiple Approaches, Frequency Analysis, Dry Run, Complexity Breakdown, and Interview Insights for This Popular String Counting Problem

LeetCode 1833: Maximum Ice Cream Bars – Java Greedy & Counting Sort Solution Explained

Learn Greedy Algorithms, Counting Sort Optimization, Dry Runs, Complexity Analysis, and Interview Strategies Through This Classic Budget Allocation Problem

LeetCode 1732: Find the Highest Altitude – Java Prefix Sum Solution Explained

Master Running Sum and Prefix Sum Techniques with Step-by-Step Explanation, Dry Run, Alternative Approaches, Complexity Analysis, and Interview Insights

LeetCode 845: Longest Mountain in Array – Java Solution with Peak Expansion

Learn how to identify mountain peaks, expand in both directions, and find the longest valid mountain subarray using O(n) time and O(1) extra space.

LeetCode 41: First Missing Positive – O(n) Time and O(1) Space Java Solution

A complete explanation of the cyclic placement technique for finding the smallest missing positive integer in an unsorted array.

LeetCode 55: Jump Game – Java Greedy Solution with Explanation and Dry Run

Learn how to solve LeetCode 55 Jump Game using a simple greedy approach by tracking the farthest index reachable at every step.

LeetCode 1189: Maximum Number of Balloons – Java HashMap and Frequency Counting Solution

SEO Subtitle Learn Multiple Approaches, Frequency Analysis, Dry Run, Complexity Breakdown, and Interview Insights for This Popular String Counting Problem

LeetCode 1833: Maximum Ice Cream Bars – Java Greedy & Counting Sort Solution Explained

Learn Greedy Algorithms, Counting Sort Optimization, Dry Runs, Complexity Analysis, and Interview Strategies Through This Classic Budget Allocation Problem

LeetCode 1732: Find the Highest Altitude – Java Prefix Sum Solution Explained

Master Running Sum and Prefix Sum Techniques with Step-by-Step Explanation, Dry Run, Alternative Approaches, Complexity Analysis, and Interview Insights