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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Jan 27, 2026

[Hard] 1136. Parallel Courses

leetcodehardgraphtopological-sortdfsdynamic-programming

Jan 26, 2026

[Medium] 209. Minimum Size Subarray Sum

leetcodemediumarraysliding-windowbinary-searchprefix-sum

Jan 26, 2026

[Hard] 862. Shortest Subarray with Sum at Least K

leetcodehardarraysliding-windowdequeprefix-summonotonic-deque

Jan 26, 2026

[Easy] 27. Remove Element

leetcodeeasyarraytwo-pointers

Jan 25, 2026

[Medium] 354. Russian Doll Envelopes

leetcodemediumarraydynamic-programmingbinary-searchsorting

Jan 25, 2026

[Medium] 213. House Robber II

leetcodemediumarraydynamic-programming

Jan 24, 2026

[Medium] 622. Design Circular Queue

leetcodemediumarraylinked-listdesignqueue

Jan 23, 2026

[Medium] 1233. Remove Sub-Folders from the Filesystem

leetcodemediumarraystringtriesorting

Jan 22, 2026

[Medium] 1801. Number of Orders in the Backlog

leetcodemediumarrayheappriority-queuesimulation

Jan 21, 2026

[Medium] 63. Unique Paths II

leetcodemediumarraydynamic-programmingmatrix

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