SeungAh-Yoo99/Hell-of-Algorithms
Oct 2024 – Feb 2025
5 Months active
Languages Used
Java
Technical Skills
AlgorithmDepth First SearchProblem SolvingAlgorithm ImplementationAlgorithm OptimizationAlgorithms
yaejinkong
PROFILE
Yaejinkong
Over five months, contributed extensively to the SeungAh-Yoo99/Hell-of-Algorithms repository by developing and refining 90 Java-based algorithm solutions for coding interview and competitive programming problems. Focused on correctness, maintainability, and performance, the work spanned areas such as array manipulation, combinatorics, sorting, graph traversal, and string processing. Leveraged Java, data structures, and algorithmic techniques including depth-first search, greedy algorithms, and priority queues to deliver reusable, well-documented solutions. Emphasized batch-driven development, iterative refinement, and disciplined version control to ensure code quality and rapid onboarding. The resulting library supports automated scoring, robust problem-solving templates, and accelerated feedback for learners and engineers.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
155Total
Bugs
0
Commits
155
Features
90
Lines of code
3,721
Activity Months5
Your Network
1133 peopleShared Repositories
2
Work History
February 2025
58 Commits • 37 Features
Feb 1, 2025February 2025 performance summary for SeungAh-Yoo99/Hell-of-Algorithms. The month focused on expanding the Java-based Programmer’s problems library and stabilizing newly added solutions. Key features delivered include Java solutions for Programmer's problems across multiple batches (250201, 250203–250217, 250204–250206, 250210–250217, etc.), covering topics from dynamic programming to graph traversal, with emphasis on correctness, readability, and maintainability. Ongoing batch-driven development enabled rapid addition of new problems and iterative refinement of existing solutions. Major bugs fixed: targeted refinements and bug fixes across several problems to improve correctness and stability, notably second-pass fixes for 43163 (and 43163(2)), 181844 (2), 181843 (2), and 181851 (2). Overall impact and accomplishments: expanded algorithm library, improved solution reliability, and strengthened the organization's ability to provide a comprehensive, up-to-date interview prep resource. The work supports faster onboarding for new engineers and reduces time-to-value for stakeholders relying on ready-to-use algorithm implementations. Technologies/skills demonstrated: Java, algorithmic problem solving, batch/branch management, code quality improvements, and disciplined version control with clear batch tagging and commit history.
58 Commits • 37 Features
Feb 1, 2025February 2025 performance summary for SeungAh-Yoo99/Hell-of-Algorithms. The month focused on expanding the Java-based Programmer’s problems library and stabilizing newly added solutions. Key features delivered include Java solutions for Programmer's problems across multiple batches (250201, 250203–250217, 250204–250206, 250210–250217, etc.), covering topics from dynamic programming to graph traversal, with emphasis on correctness, readability, and maintainability. Ongoing batch-driven development enabled rapid addition of new problems and iterative refinement of existing solutions. Major bugs fixed: targeted refinements and bug fixes across several problems to improve correctness and stability, notably second-pass fixes for 43163 (and 43163(2)), 181844 (2), 181843 (2), and 181851 (2). Overall impact and accomplishments: expanded algorithm library, improved solution reliability, and strengthened the organization's ability to provide a comprehensive, up-to-date interview prep resource. The work supports faster onboarding for new engineers and reduces time-to-value for stakeholders relying on ready-to-use algorithm implementations. Technologies/skills demonstrated: Java, algorithmic problem solving, batch/branch management, code quality improvements, and disciplined version control with clear batch tagging and commit history.
February 2025
January 2025
76 Commits • 38 Features
Jan 1, 2025January 2025: Expanded the Hell-of-Algorithms repository with a broad set of Java-based Programmers solutions, extensive refactoring for maintainability, and batch-style problem coverage across the 1819xx series and related problems. Focused on quality, consistency, and business value by delivering reliable implementations, enhancing the problem-solving library, and improving onboarding with standardized structure.
January 2025
76 Commits • 38 Features
Jan 1, 2025January 2025: Expanded the Hell-of-Algorithms repository with a broad set of Java-based Programmers solutions, extensive refactoring for maintainability, and batch-style problem coverage across the 1819xx series and related problems. Focused on quality, consistency, and business value by delivering reliable implementations, enhancing the problem-solving library, and improving onboarding with standardized structure.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 — Key feature delivered: Implemented a Java-based solution for Programmers 42840 (Highest-Scoring Students) in the SeungAh-Yoo99/Hell-of-Algorithms repository. The solution computes scores by comparing each student's answer pattern with the provided answers and returns the 1-based indices of the student(s) with the maximum score. This feature is implemented in a maintainable, test-friendly style and is associated with commit ca95d3885571ed37f9cb983ec9c3fa13a6bacb93 ("241127 프로그래머스 42840 java"). Major bugs fixed: none reported this month. Overall impact and accomplishments: enables automated, scalable scoring for this problem type, reducing manual verification and accelerating feedback; demonstrates solid algorithmic reasoning and Java proficiency. Technologies/skills demonstrated: Java, algorithm design, pattern matching, arrays, solution maintainability, and commit hygiene.
1 Commits • 1 Features
Dec 1, 2024December 2024 — Key feature delivered: Implemented a Java-based solution for Programmers 42840 (Highest-Scoring Students) in the SeungAh-Yoo99/Hell-of-Algorithms repository. The solution computes scores by comparing each student's answer pattern with the provided answers and returns the 1-based indices of the student(s) with the maximum score. This feature is implemented in a maintainable, test-friendly style and is associated with commit ca95d3885571ed37f9cb983ec9c3fa13a6bacb93 ("241127 프로그래머스 42840 java"). Major bugs fixed: none reported this month. Overall impact and accomplishments: enables automated, scalable scoring for this problem type, reducing manual verification and accelerating feedback; demonstrates solid algorithmic reasoning and Java proficiency. Technologies/skills demonstrated: Java, algorithm design, pattern matching, arrays, solution maintainability, and commit hygiene.
December 2024
November 2024
18 Commits • 13 Features
Nov 1, 2024November 2024 — SeungAh-Yoo99/Hell-of-Algorithms: Delivered a broad set of production-quality Java algorithm solutions, strengthening the reusable problem-solving toolkit for coding interviews and competitive programming. Focused on correctness, edge-case resilience, and performance optimizations across diverse domains, including cryptography, combinatorics, sorting, geometry, string processing, and optimization. The month emphasized clear patterns, robust handling of inputs, and clean, well-documented commits.
November 2024
18 Commits • 13 Features
Nov 1, 2024November 2024 — SeungAh-Yoo99/Hell-of-Algorithms: Delivered a broad set of production-quality Java algorithm solutions, strengthening the reusable problem-solving toolkit for coding interviews and competitive programming. Focused on correctness, edge-case resilience, and performance optimizations across diverse domains, including cryptography, combinatorics, sorting, geometry, string processing, and optimization. The month emphasized clear patterns, robust handling of inputs, and clean, well-documented commits.
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024: Delivered Java implementations for Programmers Problem 131705 (count triplets summing to zero) in SeungAh-Yoo99/Hell-of-Algorithms. Implemented both brute-force and DFS-based approaches to enumerate valid triplets and verify the core requirement. Added two commits documenting progressive development (8a9493633d6726d30c7e07a1438a6fdc14ffa525, 6a7f6496474cf13645a139fcef743cb697b16c29). No major bugs recorded this month; main focus was feature delivery and library enrichment. Impact: expands the algorithm practice library, enabling quick reuse of patterns for triplet counting and combinatorial problems; improves learning resources and problem-solving capabilities. Skills demonstrated: Java programming, algorithm design (brute-force and DFS), problem-solving templates, Git version control.
2 Commits • 1 Features
Oct 1, 2024October 2024: Delivered Java implementations for Programmers Problem 131705 (count triplets summing to zero) in SeungAh-Yoo99/Hell-of-Algorithms. Implemented both brute-force and DFS-based approaches to enumerate valid triplets and verify the core requirement. Added two commits documenting progressive development (8a9493633d6726d30c7e07a1438a6fdc14ffa525, 6a7f6496474cf13645a139fcef743cb697b16c29). No major bugs recorded this month; main focus was feature delivery and library enrichment. Impact: expands the algorithm practice library, enabling quick reuse of patterns for triplet counting and combinatorial problems; improves learning resources and problem-solving capabilities. Skills demonstrated: Java programming, algorithm design (brute-force and DFS), problem-solving templates, Git version control.
October 2024
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Quality Metrics
Correctness97.6%
Maintainability96.0%
Architecture95.2%
Performance89.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
AlgorithmAlgorithm ImplementationAlgorithm OptimizationAlgorithm implementationAlgorithmsArray ManipulationArray ProcessingArray handlingArray manipulationArray processingArray sortingBasic ArithmeticBigIntegerBreadth-First SearchCombinatorics
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