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

Latest Posts

Mar 21, 2026

713. Subarray Product Less Than K

leetcodemediumarraysliding-window

Mar 20, 2026

309. Best Time to Buy and Sell Stock with Cooldown

leetcodemediumdpstock

Mar 19, 2026

362. Design Hit Counter

leetcodemediumdesignqueuesliding-window

Mar 18, 2026

1448. Count Good Nodes in Binary Tree

leetcodemediumtreedfsbfs

Mar 17, 2026

1376. Time Needed to Inform All Employees

leetcodemediumtreegraphdfsbfs

Mar 16, 2026

2406. Divide Intervals Into Minimum Number of Groups

leetcodemediumintervalheapsweep-line

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All Posts

Jan 4, 2026

1400. Construct K Palindrome Strings

leetcodemediumstringgreedyhash-table

Jan 4, 2026

1247. Minimum Swaps to Make Strings Equal

leetcodemediumstringmathgreedy

Jan 4, 2026

1029. Two City Scheduling

leetcodemediumarraygreedysorting

Jan 4, 2026

135. Candy

leetcodehardarraygreedy

Jan 4, 2026

1710. Maximum Units on a Truck

leetcodeeasyarraygreedysorting

Jan 4, 2026

1217. Minimum Cost to Move Chips to The Same Position

leetcodeeasyarraymathgreedy

Jan 3, 2026

561. Array Partition

leetcodeeasyarraygreedysorting

Jan 3, 2026

122. Best Time to Buy and Sell Stock II

leetcodemediumarraygreedydynamic-programming

Jan 3, 2026

392. Is Subsequence

leetcodeeasystringtwo-pointersgreedydynamic-programming

Jan 3, 2026

55. Jump Game

leetcodemediumarraygreedydynamic-programming