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 4, 2026

787. Cheapest Flights Within K Stops

leetcodemediumgraphshortest-pathdynamic-programmingbellman-ford

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

View All Posts

All Posts

Nov 5, 2025

[Easy] 485. Max Consecutive Ones

leetcodealgorithmeasycpparrayssliding-windowproblem-solving

Nov 5, 2025

[Medium] 18. 4Sum

leetcodealgorithmmediumcpparraystwo-pointerssortingproblem-solving

Oct 29, 2025

LeetCode Templates: Trees

Contents

leetcodetemplatestrees

Oct 29, 2025

LeetCode Templates: Math & Geometry

Contents

leetcodetemplatesmathgeometry

Oct 29, 2025

LeetCode Templates: Graph

Contents

leetcodetemplatesgraph

Oct 29, 2025

LeetCode Templates: Dynamic Programming

Contents

leetcodetemplatesdynamic-programming

Oct 29, 2025

LeetCode Templates: Data Structures

Contents

leetcodetemplatesdata-structures

Oct 29, 2025

LeetCode Templates: Arrays & Strings

Contents

leetcodetemplatesarraysstrings

Oct 29, 2025

LeetCode Templates: Advanced Techniques

Contents

leetcodetemplatesadvanced

Oct 29, 2025

LeetCode Categories and Solution Templates

leetcodealgorithmproblem-solvingtemplates