Robina Li

Welcome to My Technical Blog

Exploring algorithms, data structures, and software engineering insights through detailed LeetCode problem solutions

169+ Problems Solved

3 Difficulty Levels

20+ Categories

Latest Posts

Feb 3, 2026

743. Network Delay Time

leetcodemediumgraphshortest-pathdijkstra

Feb 2, 2026

974. Subarray Sums Divisible by K

leetcodemediumarrayhash-tableprefix-sum

Feb 2, 2026

843. Guess the Word

leetcodehardarraystringinteractiveminmax

Feb 1, 2026

560. Subarray Sum Equals K

leetcodemediumarrayhash-tableprefix-sum

Feb 1, 2026

325. Maximum Size Subarray Sum Equals k

leetcodemediumarrayhash-tableprefix-sum

Feb 1, 2026

44. Wildcard Matching

leetcodehardstringdynamic-programminggreedytwo-pointers

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Nov 24, 2025

LeetCode Templates: DFS

Contents

leetcodetemplatesdfsgraph

Nov 24, 2025

LeetCode Templates: Data Structure Design

Contents

leetcodetemplatesdesign

Nov 24, 2025

LeetCode Templates: BFS

Contents

leetcodetemplatesbfsgraph

Nov 24, 2025

LeetCode Templates: Backtracking

Contents

leetcodetemplatesbacktracking

Nov 24, 2025

LeetCode Templates: Array & Matrix

Contents

leetcodetemplatesarraymatrix

Nov 20, 2025

[Medium] 200. Number of Islands

leetcodealgorithmmediumcppdfsgraphmatrixproblem-solving

Nov 18, 2025

[Medium] 969. Pancake Sorting

leetcodealgorithmmediumcpparraysortingproblem-solving

Nov 18, 2025

[Medium] 49. Group Anagrams

leetcodealgorithmmediumcppstringhash-tableproblem-solving

Nov 18, 2025

[Medium] 45. Jump Game II

leetcodealgorithmmediumcpparraygreedyproblem-solving

Nov 18, 2025

[Medium] 2. Add Two Numbers

leetcodealgorithmmediumcpplinked-listrecursionproblem-solving