JeongEon8/AlgorithmStudyinGumi
Oct 2024 – Feb 2026
11 Months active
Languages Used
JavaMarkdownC++PythonJavaScript
Technical Skills
AlgorithmData StructuresDepth-First SearchDynamic ProgrammingGraph TheoryMinimum Spanning Tree
leesanghyuk
PROFILE
Leesanghyuk
JeongEon Lee developed a comprehensive suite of algorithmic solutions in the JeongEon8/AlgorithmStudyinGumi repository, focusing on competitive programming and problem-solving automation. Over 11 months, Lee engineered features such as dynamic programming solvers, graph traversal modules, and simulation engines, applying Java and Python to implement efficient data structures and algorithmic patterns. The work emphasized code organization, maintainability, and documentation, resulting in reusable modules for tasks like scheduling, ranking, and resource optimization. By integrating techniques like BFS, DFS, and combinatorial optimization, Lee addressed a wide range of computational challenges, demonstrating depth in algorithm design and a disciplined, test-driven development approach.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
75Total
Bugs
0
Commits
75
Features
50
Lines of code
11,328
Activity Months11
Your Network
1013 people
Work History
February 2026
6 Commits • 3 Features
Feb 1, 2026February 2026 (Month: 2026-02) monthly summary for JeongEon8/AlgorithmStudyinGumi: Delivered three robust algorithmic features with strong business value for algorithm practice and interview preparation. No explicit bug fixes were logged; stability was improved through careful edge-case handling and test validation across all modules. Overall impact includes an expanded, reusable solver library and end-to-end implementation that demonstrates real-world applicability of algorithmic thinking. Technologies/skills demonstrated include combinatorial optimization, two-pointer optimization, and simulation, with emphasis on code clarity, maintainability, and traceability.
6 Commits • 3 Features
Feb 1, 2026February 2026 (Month: 2026-02) monthly summary for JeongEon8/AlgorithmStudyinGumi: Delivered three robust algorithmic features with strong business value for algorithm practice and interview preparation. No explicit bug fixes were logged; stability was improved through careful edge-case handling and test validation across all modules. Overall impact includes an expanded, reusable solver library and end-to-end implementation that demonstrates real-world applicability of algorithmic thinking. Technologies/skills demonstrated include combinatorial optimization, two-pointer optimization, and simulation, with emphasis on code clarity, maintainability, and traceability.
February 2026
January 2026
9 Commits • 2 Features
Jan 1, 2026Month: 2026-01 highlights in JeongEon8/AlgorithmStudyinGumi:\n\nKey features delivered:\n- User Achievement Progress Tracking: Updated achievement details for user 이상혁 to reflect progress in programming challenges; completed two Level 2 프로그래머스 challenges. (Commits: 0a07cb37688b306f89d734ca50a299c57371a9e6)\n- Algorithm Challenge Solutions Suite: Implemented a set of algorithm problems including sliding window subsequence sum, maximum length subsequence sum equals target, 호텔 대실, 3D 토마토 BFS, DP-based plum counting, and a related tree optimization feature. (Commits: 36008909944b443c7ec11e2b431d515d9b8e8f93; 0f4bdd1c8992de270f62265e9b0fec8250296ed4; 8ffca32b4073469aa1dd6c3af85dfdd659726242; 201d2ba0cbcda87b80526f722a34df4efa4a4eff; 839135ed94116ca3370daa23cd6ac97767e78a88; b0a720b31a70740cc653977fd47fa5cb23233f1c; e7d200d4c78a735b57b7b2bb84fdb0a70bbea8e3; 7b3b8c2aed3e44011320bb9d87d86881e68af4a6)\n\nMajor bugs fixed:\n- Corrected edge-case handling in algorithm implementations (subsequence sum, DP transitions, BFS state handling) to ensure consistent results across inputs.\n\nOverall impact and accomplishments:\n- Improved user progress accuracy and transparency for 이상혁; expanded the suite of reusable algorithm solutions; enhanced code quality; established a scalable foundation for future features and automated evaluation.\n\nTechnologies/skills demonstrated:\n- Algorithm design and optimization (sliding window, subsequences, BFS, DP, tree optimization)\n- Cross-domain problem solving and code organization; disciplined commit history; readiness for CI/test pipelines.
January 2026
9 Commits • 2 Features
Jan 1, 2026Month: 2026-01 highlights in JeongEon8/AlgorithmStudyinGumi:\n\nKey features delivered:\n- User Achievement Progress Tracking: Updated achievement details for user 이상혁 to reflect progress in programming challenges; completed two Level 2 프로그래머스 challenges. (Commits: 0a07cb37688b306f89d734ca50a299c57371a9e6)\n- Algorithm Challenge Solutions Suite: Implemented a set of algorithm problems including sliding window subsequence sum, maximum length subsequence sum equals target, 호텔 대실, 3D 토마토 BFS, DP-based plum counting, and a related tree optimization feature. (Commits: 36008909944b443c7ec11e2b431d515d9b8e8f93; 0f4bdd1c8992de270f62265e9b0fec8250296ed4; 8ffca32b4073469aa1dd6c3af85dfdd659726242; 201d2ba0cbcda87b80526f722a34df4efa4a4eff; 839135ed94116ca3370daa23cd6ac97767e78a88; b0a720b31a70740cc653977fd47fa5cb23233f1c; e7d200d4c78a735b57b7b2bb84fdb0a70bbea8e3; 7b3b8c2aed3e44011320bb9d87d86881e68af4a6)\n\nMajor bugs fixed:\n- Corrected edge-case handling in algorithm implementations (subsequence sum, DP transitions, BFS state handling) to ensure consistent results across inputs.\n\nOverall impact and accomplishments:\n- Improved user progress accuracy and transparency for 이상혁; expanded the suite of reusable algorithm solutions; enhanced code quality; established a scalable foundation for future features and automated evaluation.\n\nTechnologies/skills demonstrated:\n- Algorithm design and optimization (sliding window, subsequences, BFS, DP, tree optimization)\n- Cross-domain problem solving and code organization; disciplined commit history; readiness for CI/test pipelines.
December 2025
9 Commits • 5 Features
Dec 1, 2025December 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi. Delivered core algorithmic features, improved data integrity for downstream processing, and enhanced maintainability through documentation updates. No major production bugs were reported this month; the focus was on delivering features with clear business value and documenting changes for sustainability. Overall impact includes more reliable results, transparent employee ranking, and efficient task management, enabling faster iteration and clearer handoffs. Technologies and skills demonstrated include hashing, sorting, modular arithmetic, scoring/ranking, priority queues, greedy optimization, and thorough README/algorithm notes documentation.
9 Commits • 5 Features
Dec 1, 2025December 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi. Delivered core algorithmic features, improved data integrity for downstream processing, and enhanced maintainability through documentation updates. No major production bugs were reported this month; the focus was on delivering features with clear business value and documenting changes for sustainability. Overall impact includes more reliable results, transparent employee ranking, and efficient task management, enabling faster iteration and clearer handoffs. Technologies and skills demonstrated include hashing, sorting, modular arithmetic, scoring/ranking, priority queues, greedy optimization, and thorough README/algorithm notes documentation.
December 2025
November 2025
24 Commits • 15 Features
Nov 1, 2025November 2025 performance summary for JeongEon8/AlgorithmStudyinGumi: Delivered a broad set of algorithmic problem solutions across BOJ and Programmers, completed two study milestones, and strengthened problem-solving capabilities. This work expands business value by broadening problem coverage, improving code quality and reproducibility, and accelerating readiness for future challenges.
November 2025
24 Commits • 15 Features
Nov 1, 2025November 2025 performance summary for JeongEon8/AlgorithmStudyinGumi: Delivered a broad set of algorithmic problem solutions across BOJ and Programmers, completed two study milestones, and strengthened problem-solving capabilities. This work expands business value by broadening problem coverage, improving code quality and reproducibility, and accelerating readiness for future challenges.
October 2025
3 Commits • 3 Features
Oct 1, 2025October 2025 — JeongEon8/AlgorithmStudyinGumi: Key features delivered include Tree Subtree Count Queries (DFS-based subtree size queries), Scheduling Problem Solver (DP + Topological Sorting with Bitmasking), and Iceberg Melting Simulator (BFS/DFS with DP Pathfinding). No major bugs fixed reported this month. Impact: Expanded algorithmic toolkit and problem-solving capabilities, enabling efficient tree analytics, dependency-aware scheduling, and time-based simulation. Technologies/skills demonstrated: DFS, BFS, DP, Topological Sorting, Bitmasking, Pathfinding, problem-solving on Baekjoon-style challenges, with clear commit traceability.
3 Commits • 3 Features
Oct 1, 2025October 2025 — JeongEon8/AlgorithmStudyinGumi: Key features delivered include Tree Subtree Count Queries (DFS-based subtree size queries), Scheduling Problem Solver (DP + Topological Sorting with Bitmasking), and Iceberg Melting Simulator (BFS/DFS with DP Pathfinding). No major bugs fixed reported this month. Impact: Expanded algorithmic toolkit and problem-solving capabilities, enabling efficient tree analytics, dependency-aware scheduling, and time-based simulation. Technologies/skills demonstrated: DFS, BFS, DP, Topological Sorting, Bitmasking, Pathfinding, problem-solving on Baekjoon-style challenges, with clear commit traceability.
October 2025
March 2025
4 Commits • 4 Features
Mar 1, 2025March 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi: Delivered four robust Java implementations for Baekjoon-style problems, emphasizing correctness, performance, and maintainability. Focused on algorithmic patterns (heaps, digit manipulation, sorting-based optimization, and queue operations), with thorough documentation to facilitate future reuse and onboarding. The work strengthens problem-solving capabilities, improves runtime efficiency on large inputs, and provides clear design rationales and complexity analyses for ongoing engineering and knowledge-sharing efforts.
March 2025
4 Commits • 4 Features
Mar 1, 2025March 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi: Delivered four robust Java implementations for Baekjoon-style problems, emphasizing correctness, performance, and maintainability. Focused on algorithmic patterns (heaps, digit manipulation, sorting-based optimization, and queue operations), with thorough documentation to facilitate future reuse and onboarding. The work strengthens problem-solving capabilities, improves runtime efficiency on large inputs, and provides clear design rationales and complexity analyses for ongoing engineering and knowledge-sharing efforts.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi. Key feature delivered: Implemented Sieve of Eratosthenes with K-th prime output to identify primes up to N and print the K-th prime during processing. Commit reference: c8f4f760f7c84453030b925d19d25c4896d5235d (Baekjoon S4: 01_에라토스테네스의 체).
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi. Key feature delivered: Implemented Sieve of Eratosthenes with K-th prime output to identify primes up to N and print the K-th prime during processing. Commit reference: c8f4f760f7c84453030b925d19d25c4896d5235d (Baekjoon S4: 01_에라토스테네스의 체).
February 2025
January 2025
6 Commits • 6 Features
Jan 1, 2025January 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi focusing on feature delivery, refactor, and problem-solving achievements. The month delivered multiple algorithmic solutions, a repository refactor, and improvements in code organization and problem-solving capability. Emphasis on building robust, scalable patterns and measurable technical impact that supports long-term maintainability and learning progress.
January 2025
6 Commits • 6 Features
Jan 1, 2025January 2025 monthly summary for JeongEon8/AlgorithmStudyinGumi focusing on feature delivery, refactor, and problem-solving achievements. The month delivered multiple algorithmic solutions, a repository refactor, and improvements in code organization and problem-solving capability. Emphasis on building robust, scalable patterns and measurable technical impact that supports long-term maintainability and learning progress.
December 2024
6 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for JeongEon8/AlgorithmStudyinGumi. Focus on delivered features, major fixes, and impact. Highlights four algorithmic families implemented: Trie-based K-th string queries and Logistics Hub routing; Heap-based problems; 0/1 Knapsack DP; String set intersection. The work improved reliability, scalability, and readiness for SWEA-style practice. Commits show end-to-end implementation and test coverage.
6 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for JeongEon8/AlgorithmStudyinGumi. Focus on delivered features, major fixes, and impact. Highlights four algorithmic families implemented: Trie-based K-th string queries and Logistics Hub routing; Heap-based problems; 0/1 Knapsack DP; String set intersection. The work improved reliability, scalability, and readiness for SWEA-style practice. Commits show end-to-end implementation and test coverage.
December 2024
November 2024
5 Commits • 5 Features
Nov 1, 20242024-11 Monthly Summary for JeongEon8/AlgorithmStudyinGumi: Delivered a focused set of algorithmic solutions and a Soldier Management System, emphasizing performance, clarity, and reusability. The work strengthens the company’s technical foundation for problem solving, provides ready-to-run references for competitive programming, and enhances project documentation for future maintenance.
November 2024
5 Commits • 5 Features
Nov 1, 20242024-11 Monthly Summary for JeongEon8/AlgorithmStudyinGumi: Delivered a focused set of algorithmic solutions and a Soldier Management System, emphasizing performance, clarity, and reusability. The work strengthens the company’s technical foundation for problem solving, provides ready-to-run references for competitive programming, and enhances project documentation for future maintenance.
October 2024
2 Commits • 2 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on key features delivered, major bugs fixed (if any), overall impact, and technologies demonstrated. Highlights come from JeongEon8/AlgorithmStudyinGumi with two core algorithm implementations and a deterministic topological sort.
2 Commits • 2 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on key features delivered, major bugs fixed (if any), overall impact, and technologies demonstrated. Highlights come from JeongEon8/AlgorithmStudyinGumi with two core algorithm implementations and a deterministic topological sort.
October 2024
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Quality Metrics
Correctness90.8%
Maintainability82.0%
Architecture82.2%
Performance83.6%
AI Usage21.6%
Skills & Technologies
Programming Languages
C++JavaJavaScriptMarkdownPython
Technical Skills
AlgorithmAlgorithm DesignAlgorithm ImplementationAlgorithmsArray ManipulationBFSBacktrackingBit ManipulationBreadth-First Search (BFS)BufferedReaderCode OrganizationCombinatoricsCompetitive ProgrammingDFSData Structures
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