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 10, 2026

[Medium] 64. Minimum Path Sum

leetcodemediumarraydynamic-programmingmatrix

Jan 10, 2026

[Hard] 1340. Jump Game V

leetcodehardarraydynamic-programmingdfsmemoization

Jan 9, 2026

[Medium] 673. Number of Longest Increasing Subsequence

leetcodemediumarraydynamic-programming

Jan 8, 2026

[Medium] 692. Top K Frequent Words

leetcodemediumhash-tableheapsortingstring

Jan 8, 2026

[Medium] 5. Longest Palindromic Substring

leetcodemediumstringtwo-pointersdynamic-programming

Jan 7, 2026

[Medium] 429. N-ary Tree Level Order Traversal

leetcodemediumtreebfsn-ary-tree

Jan 7, 2026

[Medium] 323. Number of Connected Components in an Undirected Graph

leetcodemediumgraphbfsdfsunion-find

Jan 7, 2026

[Medium] 102. Binary Tree Level Order Traversal

leetcodemediumtreebfsbinary-tree

Jan 7, 2026

[Easy] 993. Cousins in Binary Tree

leetcodeeasytreebfsbinary-tree

Jan 6, 2026

[Medium] 103. Binary Tree Zigzag Level Order Traversal

leetcodemediumtreebfsbinary-tree

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