Robina Li

Welcome to My Technical Blog

Exploring algorithms, data structures, and software engineering insights through LeetCode solutions in Python.
NOTE: This blog is still under construction and some python code blocks may not be rendered correctly when converted from C++ with AI.

169+ Problems Solved

3 Difficulty Levels

20+ Categories

[Medium] 1962. Remove Stones to Minimize the Total

leetcodemediumarraygreedyheap

Apr 21, 2026

[Medium] 2952. Minimum Number of Coins to be Added

leetcodemediumarraygreedysorting

Apr 21, 2026

[Medium] 2592. Maximize Greatness of an Array

leetcodemediumarraygreedysorting

Apr 20, 2026

[Medium] 2571. Minimum Operations to Reduce an Integer to 0

leetcodemediummathgreedybit-manipulation

Apr 19, 2026

[Medium] 2539. Count the Number of Good Subsequences

leetcodemediumstringcombinatoricsmathhash-map

Apr 18, 2026

[Medium] 329. Longest Increasing Path in a Matrix

leetcodemediummatrixdynamic-programmingdfs

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Oct 8, 2025

[Medium] 240. Search a 2D Matrix II

pythonbinary-searchmatrix2d-arraydivide-conquersearchoptimizationproblem-solving

Oct 6, 2025

[Medium] 912. Sort an Array

pythonsortingmerge-sortheap-sortcounting-sortdata-structuresdivide-conquerproblem-solving

Oct 5, 2025

[Hard] 218. The Skyline Problem

pythonsweep-linepriority-queuedata-structuresunion-findproblem-solving

Oct 4, 2025

[Medium] 990. Satisfiability of Equality Equations

pythonconnected-componentsgraph-coloringdisjoint-setproblem-solving

Oct 3, 2025

[Medium] 96. Unique Binary Search Trees

pythonbinary-search-treesproblem-solving

Sep 30, 2025

[Medium] 131. Palindrome Partitioning

pythonpartitioningproblem-solving

Sep 29, 2025

[Medium] 77. Combinations

pythoncombinationsdfsproblem-solving

Sep 25, 2025

[Medium] 89. Gray Code

pythongray-codeproblem-solving

Sep 25, 2025

[Medium] 54. Spiral Matrix

pythonspiral-matrixproblem-solving

Sep 25, 2025

[Medium] 50. Pow(x, n)

pythonpowproblem-solving

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