Problem-solve-study/code-store
Jan 2025 – Jul 2025
7 Months active
Languages Used
JavaC++BatchMarkdownShell
Technical Skills
AlgorithmAlgorithm ImplementationBacktrackingBreadth-First SearchCode DocumentationCombinatorics
손현수
PROFILE
손현수
Developed and maintained the Problem-solve-study/code-store repository, delivering over 120 algorithmic features in seven months with a focus on competitive programming workflows. Built scalable batch-based delivery for Baekjoon Online Judge solutions, emphasizing maintainable Java and C++ code, robust documentation, and automation through shell scripting. Applied advanced techniques such as dynamic programming, graph traversal, and greedy algorithms, while optimizing input/output and memory usage. Enhanced repository hygiene and onboarding by refining auto-commit scripts and standardizing documentation. Addressed bug fixes in automation and code organization, demonstrating depth in algorithm implementation, code quality, and process reliability across a diverse set of problem-solving challenges.
Overall Statistics
Feature vs Bugs
95%Features
Repository Contributions
236Total
Bugs
6
Commits
236
Features
120
Lines of code
15,391
Activity Months7
Your Network
1146 peopleShared Repositories
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Work History
July 2025
14 Commits • 3 Features
Jul 1, 2025July 2025: Delivered core platform enhancements in Problem-solve-study/code-store, expanding problem-solving capabilities and automation, with documentation improvements. Key features include Baekjoon Problem Solver Suite consolidation (DP, prefix sums, DSU), and Graph-based BFS Pathfinding Variants for reliable shortest-path solutions with grid obstacles, teleports, and Hamming-distance graphs. Fixed critical bug in auto-commit script pattern matching to prevent README linking issues. Updated README with daily problems and links to improve onboarding and daily problem discovery. These changes accelerated BOJ problem solving, expanded algorithm coverage, and improved automation reliability and documentation.
14 Commits • 3 Features
Jul 1, 2025July 2025: Delivered core platform enhancements in Problem-solve-study/code-store, expanding problem-solving capabilities and automation, with documentation improvements. Key features include Baekjoon Problem Solver Suite consolidation (DP, prefix sums, DSU), and Graph-based BFS Pathfinding Variants for reliable shortest-path solutions with grid obstacles, teleports, and Hamming-distance graphs. Fixed critical bug in auto-commit script pattern matching to prevent README linking issues. Updated README with daily problems and links to improve onboarding and daily problem discovery. These changes accelerated BOJ problem solving, expanded algorithm coverage, and improved automation reliability and documentation.
July 2025
June 2025
6 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for Problem-solve-study/code-store highlighting delivered features, fixed bugs, and overall impact. Focused on delivering scalable problem-solving utilities, reliable automation, and performance improvements to support faster, higher-quality solutions for coding challenges.
June 2025
6 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for Problem-solve-study/code-store highlighting delivered features, fixed bugs, and overall impact. Focused on delivering scalable problem-solving utilities, reliable automation, and performance improvements to support faster, higher-quality solutions for coding challenges.
May 2025
37 Commits • 23 Features
May 1, 2025May 2025 (2025-05) achieved broad expansion of problem-solving capabilities in Problem-solve-study/code-store through a batch-driven delivery of BOJ solutions, with an emphasis on code quality and maintainability.
37 Commits • 23 Features
May 1, 2025May 2025 (2025-05) achieved broad expansion of problem-solving capabilities in Problem-solve-study/code-store through a batch-driven delivery of BOJ solutions, with an emphasis on code quality and maintainability.
May 2025
April 2025
71 Commits • 37 Features
Apr 1, 2025April 2025 (Problem-solve-study/code-store) delivered extensive BOJ problem-solving coverage across batches 0401–0430 (N and E variants), enhanced automation and repo hygiene, and expanded documentation. Key outcomes include: broad addition of batch solutions to BOJ problems across multiple batches, improvements to the auto-commit workflow, and targeted fixes to file organization and permissions. These efforts reduced cycle times for adding new solutions, improved reliability of automated commits, and strengthened the project’s problem-solving capabilities for ongoing learning and production use.
April 2025
71 Commits • 37 Features
Apr 1, 2025April 2025 (Problem-solve-study/code-store) delivered extensive BOJ problem-solving coverage across batches 0401–0430 (N and E variants), enhanced automation and repo hygiene, and expanded documentation. Key outcomes include: broad addition of batch solutions to BOJ problems across multiple batches, improvements to the auto-commit workflow, and targeted fixes to file organization and permissions. These efforts reduced cycle times for adding new solutions, improved reliability of automated commits, and strengthened the project’s problem-solving capabilities for ongoing learning and production use.
March 2025
52 Commits • 15 Features
Mar 1, 2025March 2025 monthly summary for Problem-solve-study/code-store. Focused on expanding the problem-solving catalog by delivering batch-based BOJ solutions across multiple rounds and sets, plus targeted documentation improvements. Notable deliveries include: (1) BOJ problem solutions batch solving problems such as 14865, 2798, 2468, 9470, 2579, 1214, 16235, 1699, 10714, 11048, 9370, 2195, 2002, 14620; (2) BOJ Regular Problems Batch 2025-03-02 solving 25635, 2647, 1535, 1182, 16964, 17089, 12852; (3) BOJ Round 0317-0322 Batch 2 solving 3474, 1933, 1891, 5525, 17420, 10597, 5397, 14462; (4) Additional Baekjoon problem sets across 0301–0331 ranges including 2157, 2487, 1904, 17616, 2630, 10819, 1141, 2305, 11909, 9205, 1213, 3425, 21275, 1726, 30892, 10840, 1722, 5567, 23048, 3616, 21773, 2026; (5) Documentation refinement for BOJ references. Business value: expanded solution catalog, accelerated learning paths, and improved maintainability.
52 Commits • 15 Features
Mar 1, 2025March 2025 monthly summary for Problem-solve-study/code-store. Focused on expanding the problem-solving catalog by delivering batch-based BOJ solutions across multiple rounds and sets, plus targeted documentation improvements. Notable deliveries include: (1) BOJ problem solutions batch solving problems such as 14865, 2798, 2468, 9470, 2579, 1214, 16235, 1699, 10714, 11048, 9370, 2195, 2002, 14620; (2) BOJ Regular Problems Batch 2025-03-02 solving 25635, 2647, 1535, 1182, 16964, 17089, 12852; (3) BOJ Round 0317-0322 Batch 2 solving 3474, 1933, 1891, 5525, 17420, 10597, 5397, 14462; (4) Additional Baekjoon problem sets across 0301–0331 ranges including 2157, 2487, 1904, 17616, 2630, 10819, 1141, 2305, 11909, 9205, 1213, 3425, 21275, 1726, 30892, 10840, 1722, 5567, 23048, 3616, 21773, 2026; (5) Documentation refinement for BOJ references. Business value: expanded solution catalog, accelerated learning paths, and improved maintainability.
March 2025
February 2025
45 Commits • 27 Features
Feb 1, 2025February 2025 (2025-02) monthly summary for Problem-solve-study/code-store. Focused on delivering a broad set of BOJ problem solutions, improving maintainability with notes and comments, and preparing for scalable problem-solving workflows. No explicit bug fixes recorded; all work centers on feature implementations and documentation.
February 2025
45 Commits • 27 Features
Feb 1, 2025February 2025 (2025-02) monthly summary for Problem-solve-study/code-store. Focused on delivering a broad set of BOJ problem solutions, improving maintainability with notes and comments, and preparing for scalable problem-solving workflows. No explicit bug fixes recorded; all work centers on feature implementations and documentation.
January 2025
11 Commits • 11 Features
Jan 1, 2025January 2025 performance highlights for Problem-solve-study/code-store. Delivered a diverse set of competitive-programming solutions with emphasis on correctness, performance, and maintainability. Focused on algorithm design, robust input handling, and clear performance instrumentation to enable faster reviews and onboarding. The work demonstrates strong versatility across recursion, graph search, dynamic programming, geometry, and data-structure-based solutions, while enriching the codebase with explicit performance notes.
11 Commits • 11 Features
Jan 1, 2025January 2025 performance highlights for Problem-solve-study/code-store. Delivered a diverse set of competitive-programming solutions with emphasis on correctness, performance, and maintainability. Focused on algorithm design, robust input handling, and clear performance instrumentation to enable faster reviews and onboarding. The work demonstrates strong versatility across recursion, graph search, dynamic programming, geometry, and data-structure-based solutions, while enriching the codebase with explicit performance notes.
January 2025
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Quality Metrics
Correctness97.2%
Maintainability81.4%
Architecture79.0%
Performance86.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
BatchC++JavaMarkdownShell
Technical Skills
Ad-hoc ProgrammingAlgorithmAlgorithm ImplementationAlgorithm OptimizationAlgorithmsArray SortingAutomationBFSBack-end DevelopmentBacktrackingBase ConversionBigIntegerBigInteger HandlingBinary ExponentiationBinary Search
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