Posts

All the articles I've posted.

• LeetCode 2583 Kth Largest Sum in a Binary Tree

  18 May, 2026

  Solutions for LeetCode 2583, medium, tags: tree, breadth-first search, sorting, binary tree.

• LeetCode 46 Permutations

  17 May, 2026

  Solutions for LeetCode 46, medium, tags: array, backtracking.

• System Design - How Memory Allocators Work

  17 May, 2026

  How memory allocators work under the hood: malloc/free internals, free lists, splitting and coalescing, the buddy system, arena-based allocators like tcmalloc and jemalloc, and how modern allocators reduce lock contention in multi-threaded programs.

• LeetCode 198 House Robber

  17 May, 2026

  Solutions for LeetCode 198, medium, tags: array, dynamic programming.

• LeetCode 17 Letter Combinations of a Phone Number

  16 May, 2026

  Solutions for LeetCode 17, medium, tags: hash table, string, backtracking.

• LeetCode 54 Spiral Matrix

  16 May, 2026

  Solutions for LeetCode 54, medium, tags: array, matrix, simulation.