The Art of Technical Problem Solving

LeetCode 769: Max Chunks To Make Sorted – Java Solution, Approach & Explanation

Learn how to split a permutation into the maximum number of independently sortable chunks using recursion, partitioning, and a greedy optimization.

LeetCode 836: Rectangle Overlap – Java Solution, Explanation & Approach

Check whether two axis-aligned rectangles have a positive-area intersection using simple coordinate and boundary conditions.

LeetCode 835: Image Overlap – Java Matrix Translation Solution

Find the maximum overlap between two binary images by translating one matrix in every possible direction.

Count the Number of Good Subarrays – Apple OA DSA Problem & Java Solution

An interesting subarray-removal problem where the remaining elements must form a strictly increasing array.

LeetCode 3483: Unique 3-Digit Even Numbers – Java Backtracking Solution

Generate all possible three-digit numbers with backtracking, handle duplicate digits correctly, and count only distinct even numbers.

LeetCode 2086: Minimum Number of Food Buckets to Feed the Hamsters – Java Greedy Solution

Solve the hamster feeding problem using a simple greedy strategy, efficiently placing buckets while detecting impossible arrangements.

LeetCode 769: Max Chunks To Make Sorted – Java Solution, Approach & Explanation

Learn how to split a permutation into the maximum number of independently sortable chunks using recursion, partitioning, and a greedy optimization.

LeetCode 836: Rectangle Overlap – Java Solution, Explanation & Approach

Check whether two axis-aligned rectangles have a positive-area intersection using simple coordinate and boundary conditions.

LeetCode 835: Image Overlap – Java Matrix Translation Solution

Find the maximum overlap between two binary images by translating one matrix in every possible direction.

Count the Number of Good Subarrays – Apple OA DSA Problem & Java Solution

An interesting subarray-removal problem where the remaining elements must form a strictly increasing array.

LeetCode 3483: Unique 3-Digit Even Numbers – Java Backtracking Solution

Generate all possible three-digit numbers with backtracking, handle duplicate digits correctly, and count only distinct even numbers.

LeetCode 2086: Minimum Number of Food Buckets to Feed the Hamsters – Java Greedy Solution

Solve the hamster feeding problem using a simple greedy strategy, efficiently placing buckets while detecting impossible arrangements.