Posts

All the articles I've posted.

• LeetCode 572 Subtree of Another Tree

  14 Sep, 2026

  Solutions for LeetCode 572, easy, tags: tree, dfs, string matching, binary tree, hash function.

• LeetCode 904 Fruit Into Baskets

  14 Sep, 2026

  Solutions for LeetCode 904, medium, tags: array, hash table, sliding window.

• System Design - How Compilers Turn Source Code into Machine Code

  14 Sep, 2026

  How compilers work: the full pipeline from source code to executable — lexing, parsing, AST construction, semantic analysis, intermediate representation, optimization passes, and code generation, with source code examples from real compilers.

• LeetCode 167 Two Sum II - Input Array Is Sorted

  13 Sep, 2026

  Solutions for LeetCode 167, medium, tags: array, two pointers, binary search.

• LeetCode 224 Basic Calculator

  13 Sep, 2026

  Solutions for LeetCode 224, hard, tags: math, string, stack, recursion.

• LeetCode 32 Longest Valid Parentheses

  12 Sep, 2026

  Solutions for LeetCode 32, hard, tags: string, stack, dynamic programming.