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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Feb 1, 2026

[Medium] 560. Subarray Sum Equals K

leetcodemediumarrayhash-tableprefix-sum

Feb 1, 2026

[Medium] 325. Maximum Size Subarray Sum Equals k

leetcodemediumarrayhash-tableprefix-sum

Feb 1, 2026

[Hard] 44. Wildcard Matching

leetcodehardstringdynamic-programminggreedytwo-pointers

Jan 30, 2026

[Medium] 981. Time Based Key-Value Store

leetcodemediumhash-tablebinary-searchdesign

Jan 30, 2026

[Medium] 34. Find First and Last Position of Element in Sorted Array

leetcodemediumarraybinary-search

Jan 30, 2026

[Medium] 162. Find Peak Element

leetcodemediumarraybinary-search

Jan 30, 2026

[Easy] 35. Search Insert Position

leetcodeeasyarraybinary-search

Jan 29, 2026

[Medium] 739. Daily Temperatures

leetcodemediumarraystackmonotonic-stack

Jan 28, 2026

[Medium] 2080. Range Frequency Queries

leetcodemediumarrayhash-mapbinary-searchdesign

Jan 27, 2026

[Medium] 238. Product of Array Except Self

leetcodemediumarrayprefix-sumtwo-pointers

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