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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Apr 5, 2026

[Medium] 2433. Find The Original Array of Prefix Xor

leetcodemediumarraybit-manipulation

Apr 2, 2026

[Medium] 73. Set Matrix Zeroes

leetcodemediumarraymatrix

Apr 1, 2026

[Medium] 261. Graph Valid Tree

leetcodemediumgraphunion-finddfs

Mar 31, 2026

[Medium] 260. Single Number III

leetcodemediumarraybit-manipulation

Mar 30, 2026

[Medium] 1870. Minimum Speed to Arrive on Time

leetcodemediumbinary-search

Mar 29, 2026

[Medium] 1188. Design Bounded Blocking Queue

leetcodemediumconcurrencydesign

Mar 28, 2026

[Medium] 1115. Print FooBar Alternately

leetcodemediumconcurrencythreading

Mar 27, 2026

[Medium] 151. Reverse Words in a String

leetcodemediumstringtwo-pointers

Mar 27, 2026

[Easy] 389. Find the Difference

leetcodeeasystringbit-manipulationhash-table

Mar 27, 2026

[Easy] 1768. Merge Strings Alternately

leetcodeeasystringtwo-pointers

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