Jihye511/Ssafy_Algo_Study
Jul 2025 – Nov 2025
5 Months active
Languages Used
Java
Technical Skills
AlgorithmAlgorithmsBinary SearchBreadth-First SearchCompetitive ProgrammingData Structures
Kim_G
PROFILE
Kim_g
Over five months, Jihye Kim developed a comprehensive suite of algorithmic solutions in the Jihye511/Ssafy_Algo_Study repository, focusing on competitive programming and problem-solving patterns. She engineered robust Java implementations for graph traversal, dynamic programming, and data structure manipulation, addressing a wide range of challenges such as grid pathfinding, sequence construction, and optimization problems. Her approach emphasized correctness, reproducibility, and performance, often leveraging techniques like BFS, DFS, sliding windows, and priority queues. By building reusable templates and libraries, Jihye enabled scalable, maintainable solutions that accelerated future development and supported both interview preparation and collaborative code review scenarios.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
87Total
Bugs
0
Commits
87
Features
77
Lines of code
5,642
Activity Months5
Your Network
1010 people
Work History
November 2025
12 Commits • 6 Features
Nov 1, 20252025-11 monthly summary for Jihye511/Ssafy_Algo_Study. Delivered a comprehensive algorithm toolkit across graph theory, pathfinding, dynamic programming, data structures, and utilities, with an emphasis on reusable components and performance-oriented implementations. This month focused on enabling robust graph analysis, scalable route/path solutions, weight feasibility queries, hierarchical data representation, activity auditing, and solver utilities that can be reused across projects and competitive programming contexts.
12 Commits • 6 Features
Nov 1, 20252025-11 monthly summary for Jihye511/Ssafy_Algo_Study. Delivered a comprehensive algorithm toolkit across graph theory, pathfinding, dynamic programming, data structures, and utilities, with an emphasis on reusable components and performance-oriented implementations. This month focused on enabling robust graph analysis, scalable route/path solutions, weight feasibility queries, hierarchical data representation, activity auditing, and solver utilities that can be reused across projects and competitive programming contexts.
November 2025
October 2025
15 Commits • 12 Features
Oct 1, 2025October 2025 performance summary for Jihye511/Ssafy_Algo_Study: Delivered a broad suite of algorithmic solutions across DP, backtracking, prefix sums, and data-structure problems. Maintained strong performance across diverse problem types and implemented robust error handling and refactors to improve maintainability. The month established a scalable pattern library for competitive programming practice and business-ready problem-solving capabilities.
October 2025
15 Commits • 12 Features
Oct 1, 2025October 2025 performance summary for Jihye511/Ssafy_Algo_Study: Delivered a broad suite of algorithmic solutions across DP, backtracking, prefix sums, and data-structure problems. Maintained strong performance across diverse problem types and implemented robust error handling and refactors to improve maintainability. The month established a scalable pattern library for competitive programming practice and business-ready problem-solving capabilities.
September 2025
25 Commits • 24 Features
Sep 1, 2025In Sep 2025, contributed 24 feature implementations and optimizations in the Jihye511/Ssafy_Algo_Study repository, spanning a broad range of BOJ problems (e.g., 7682, 2668, 22251, 7490, 16234, 2138, 1863, 4485, 1253, 1806, 2467, 1987, 9935, 13144, 1976, 1027, 2179, 2631, 4179, 1238, 14658, 2206). Work centered on building robust, high-performance solutions with clear traceability and incremental improvements through multiple commits per problem. While there are no explicit bug-fix entries in this month, the changes collectively improved correctness and efficiency across algorithms and data structures. Overall impact: expanded problem coverage, accelerated learning and practice, and strengthened code quality and profiling discipline in the repository.
25 Commits • 24 Features
Sep 1, 2025In Sep 2025, contributed 24 feature implementations and optimizations in the Jihye511/Ssafy_Algo_Study repository, spanning a broad range of BOJ problems (e.g., 7682, 2668, 22251, 7490, 16234, 2138, 1863, 4485, 1253, 1806, 2467, 1987, 9935, 13144, 1976, 1027, 2179, 2631, 4179, 1238, 14658, 2206). Work centered on building robust, high-performance solutions with clear traceability and incremental improvements through multiple commits per problem. While there are no explicit bug-fix entries in this month, the changes collectively improved correctness and efficiency across algorithms and data structures. Overall impact: expanded problem coverage, accelerated learning and practice, and strengthened code quality and profiling discipline in the repository.
September 2025
August 2025
18 Commits • 18 Features
Aug 1, 2025Month: 2025-08 — Consolidated a robust algorithmic contributions suite in Jihye511/Ssafy_Algo_Study, delivering 18 feature-driven solutions across BFS/DFS, dynamic programming, two-pointer sliding windows, and graph algorithms. Implementations emphasize correctness, performance, and reproducibility, with deterministic graph traversal, optimized grid pathfinding, and scalable patterns that accelerate problem-solving and interview readiness. Edge-case handling and thorough testing across diverse inputs were prioritized to ensure reliability in review scenarios. Key features delivered: - BOJ 2075: Nth Largest Number in Matrix — flatten N x N matrix, sort, and select Nth largest with attention to memory and time efficiency. - BOJ 1138: Line Reconstruction — reconstructs order from counts of shorter people to the left, ensuring correct ordering for duplicates. - BOJ 1260: DFS and BFS Traversal (Adjacency via TreeSet) — deterministic traversal order via sorted adjacency for reproducible results. - BFS Shortest Path in Grid (14940) — computes shortest distances to all reachable cells, marking unreachable cells as -1. - BOJ 20922: Longest Subarray With At Most K Occurrences — sliding window solution enabling large-input efficiency. - BOJ 17615: Consecutive Character Changes — computes minimum changes to unify characters with efficient counting. - BOJ 2531: Max Distinct Sushi with Coupon — optimal type coverage on a circular belt with one coupon. - BOJ 1522: Minimize 'b's in Window Size Count('a') — two-pointer/window technique to minimize while respecting dynamic window size. - BOJ 1697: Hide and Seek — Shortest Time to Reach K — BFS over N, with moves -1, +1, and *2. - BOJ 15989: Sum Representations with 1,2,3 (DP) — dynamic programming counting representations. - Minimum Time to Reach K from N with -1/ +1 / *2 — BFS-based shortest-time search with multiple operations. - BOJ 12919: A/B-2 String Transformation (DFS) — DFS approach to transform strings under defined operations. - BOJ 20055: Conveyor Belt with Robots — simulation of belt/robot placement toward target state. - BOJ 16928: Snakes and Ladders — Minimum Dice Rolls — shortest path with ladders and snakes. - BOJ 20437: Substrings with At Least K Occurrences — multi-case DP/substring analysis for required occurrences. - BOJ 2493: Nearest Taller Building to Left — stack-based computation of nearest taller to the left. - BOJ 14719: Trapping Rain Water — height-based trapping calculation. - Dijkstra Shortest Path (Graph) — weighted-graph shortest paths with Dijkstra. Major bugs fixed (edge-case and correctness improvements): - Ensured deterministic, reproducible traversal orders in graph algorithms (TreeSet usage in BOJ 1260). - Corrected handling of unreachable areas in BFS grid problems (-1 marking in 14940). - Tightened edge-case handling and input validation across sliding-window, DP, and pathfinding solutions to improve correctness across boundary inputs. Overall impact and accomplishments: - Built a comprehensive, library-like set of algorithmic solutions that accelerates problem solving, interview preparation, and code review readiness. - Demonstrated strong craftsmanship in selecting appropriate data structures and patterns per problem class, leading to reliable and maintainable solutions. - Enhanced team capability to reuse templates for BFS/DFS, DP, and graph algorithms, reducing time-to-delivery for future problems. Technologies/skills demonstrated: - Java-based implementations with data structures: TreeSet, Queue/Deque, arrays, and hash maps. - Algorithms: BFS/DFS, Dijkstra, dynamic programming, sliding windows, two-pointers, and greedy approaches. - Performance awareness: attention to runtimes (commit messages indicate measured improvements) and deterministic behavior for tests and reviews.
August 2025
18 Commits • 18 Features
Aug 1, 2025Month: 2025-08 — Consolidated a robust algorithmic contributions suite in Jihye511/Ssafy_Algo_Study, delivering 18 feature-driven solutions across BFS/DFS, dynamic programming, two-pointer sliding windows, and graph algorithms. Implementations emphasize correctness, performance, and reproducibility, with deterministic graph traversal, optimized grid pathfinding, and scalable patterns that accelerate problem-solving and interview readiness. Edge-case handling and thorough testing across diverse inputs were prioritized to ensure reliability in review scenarios. Key features delivered: - BOJ 2075: Nth Largest Number in Matrix — flatten N x N matrix, sort, and select Nth largest with attention to memory and time efficiency. - BOJ 1138: Line Reconstruction — reconstructs order from counts of shorter people to the left, ensuring correct ordering for duplicates. - BOJ 1260: DFS and BFS Traversal (Adjacency via TreeSet) — deterministic traversal order via sorted adjacency for reproducible results. - BFS Shortest Path in Grid (14940) — computes shortest distances to all reachable cells, marking unreachable cells as -1. - BOJ 20922: Longest Subarray With At Most K Occurrences — sliding window solution enabling large-input efficiency. - BOJ 17615: Consecutive Character Changes — computes minimum changes to unify characters with efficient counting. - BOJ 2531: Max Distinct Sushi with Coupon — optimal type coverage on a circular belt with one coupon. - BOJ 1522: Minimize 'b's in Window Size Count('a') — two-pointer/window technique to minimize while respecting dynamic window size. - BOJ 1697: Hide and Seek — Shortest Time to Reach K — BFS over N, with moves -1, +1, and *2. - BOJ 15989: Sum Representations with 1,2,3 (DP) — dynamic programming counting representations. - Minimum Time to Reach K from N with -1/ +1 / *2 — BFS-based shortest-time search with multiple operations. - BOJ 12919: A/B-2 String Transformation (DFS) — DFS approach to transform strings under defined operations. - BOJ 20055: Conveyor Belt with Robots — simulation of belt/robot placement toward target state. - BOJ 16928: Snakes and Ladders — Minimum Dice Rolls — shortest path with ladders and snakes. - BOJ 20437: Substrings with At Least K Occurrences — multi-case DP/substring analysis for required occurrences. - BOJ 2493: Nearest Taller Building to Left — stack-based computation of nearest taller to the left. - BOJ 14719: Trapping Rain Water — height-based trapping calculation. - Dijkstra Shortest Path (Graph) — weighted-graph shortest paths with Dijkstra. Major bugs fixed (edge-case and correctness improvements): - Ensured deterministic, reproducible traversal orders in graph algorithms (TreeSet usage in BOJ 1260). - Corrected handling of unreachable areas in BFS grid problems (-1 marking in 14940). - Tightened edge-case handling and input validation across sliding-window, DP, and pathfinding solutions to improve correctness across boundary inputs. Overall impact and accomplishments: - Built a comprehensive, library-like set of algorithmic solutions that accelerates problem solving, interview preparation, and code review readiness. - Demonstrated strong craftsmanship in selecting appropriate data structures and patterns per problem class, leading to reliable and maintainable solutions. - Enhanced team capability to reuse templates for BFS/DFS, DP, and graph algorithms, reducing time-to-delivery for future problems. Technologies/skills demonstrated: - Java-based implementations with data structures: TreeSet, Queue/Deque, arrays, and hash maps. - Algorithms: BFS/DFS, Dijkstra, dynamic programming, sliding windows, two-pointers, and greedy approaches. - Performance awareness: attention to runtimes (commit messages indicate measured improvements) and deterministic behavior for tests and reviews.
July 2025
17 Commits • 17 Features
Jul 1, 2025July 2025 performance snapshot for Jihye511/Ssafy_Algo_Study: Delivered a broad suite of algorithmic solutions across competitive-programming style problems, reinforcing a strong foundation in data structures, search strategies, and optimization techniques. Key features delivered include cost-optimized travel, budget distribution via binary search, sliding-window max-sum subarrays, BFS-based pathfinding, and several string/Set/sequence algorithms. While no explicit bug-fix tickets are recorded for this period, the work significantly expands the reusable problem-solving toolkit, accelerates future solution delivery, and demonstrates the ability to balance correctness, efficiency, and readability across languages and problem domains.
17 Commits • 17 Features
Jul 1, 2025July 2025 performance snapshot for Jihye511/Ssafy_Algo_Study: Delivered a broad suite of algorithmic solutions across competitive-programming style problems, reinforcing a strong foundation in data structures, search strategies, and optimization techniques. Key features delivered include cost-optimized travel, budget distribution via binary search, sliding-window max-sum subarrays, BFS-based pathfinding, and several string/Set/sequence algorithms. While no explicit bug-fix tickets are recorded for this period, the work significantly expands the reusable problem-solving toolkit, accelerates future solution delivery, and demonstrates the ability to balance correctness, efficiency, and readability across languages and problem domains.
July 2025
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Quality Metrics
Correctness93.0%
Maintainability80.0%
Architecture78.8%
Performance88.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
AlgorithmAlgorithm ImplementationAlgorithmsBacktrackingBinary SearchBit ManipulationBitmaskingBreadth First SearchBreadth-First SearchBreadth-First Search (BFS)Competitive ProgrammingData StructuresDepth First SearchDepth-First SearchDepth-First Search (DFS)
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