Posts

All the articles I've posted.

• System Design - How Columnar Storage Works

  1 Jun, 2026

  How columnar storage works: row vs column layout, compression techniques, vectorized execution, Apache Parquet internals, and why modern analytics engines like ClickHouse and DuckDB are so fast.

• LeetCode 1091 Shortest Path in Binary Matrix

  1 Jun, 2026

  Solutions for LeetCode 1091, medium, tags: array, breadth-first search, matrix, shortest path.

• LeetCode 138 Copy List with Random Pointer

  31 May, 2026

  Solutions for LeetCode 138, medium, tags: hash table, linked list.

• LeetCode 239 Sliding Window Maximum

  31 May, 2026

  Solutions for LeetCode 239, hard, tags: array, queue, sliding window, heap, monotonic queue.

• LeetCode 78 Subsets

  30 May, 2026

  Solutions for LeetCode 78, medium, tags: array, backtracking, bit manipulation.

• LeetCode 647 Palindromic Substrings

  30 May, 2026

  Solutions for LeetCode 647, medium, tags: string, dynamic programming, two pointers.