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 4, 2026

[Easy] 1217. Minimum Cost to Move Chips to The Same Position

leetcodeeasyarraymathgreedy

Jan 3, 2026

[Easy] 561. Array Partition

leetcodeeasyarraygreedysorting

Jan 3, 2026

[Medium] 122. Best Time to Buy and Sell Stock II

leetcodemediumarraygreedydynamic-programming

Jan 3, 2026

[Easy] 392. Is Subsequence

leetcodeeasystringtwo-pointersgreedydynamic-programming

Jan 3, 2026

[Medium] 55. Jump Game

leetcodemediumarraygreedydynamic-programming

Jan 3, 2026

[Medium] 452. Minimum Number of Arrows to Burst Balloons

leetcodemediumarraygreedysortingintervals

Jan 3, 2026

[Medium] 435. Non-overlapping Intervals

leetcodemediumarraygreedysortingintervalsdynamic-programming

Jan 3, 2026

[Easy] 860. Lemonade Change

leetcodeeasyarraygreedysimulation

Jan 3, 2026

[Easy] 455. Assign Cookies

leetcodeeasyarraygreedysortingtwo-pointers

Jan 2, 2026

[Medium] 351. Android Unlock Patterns

leetcodemediumbacktrackingrecursiondynamic-programming

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