DaleStudy/leetcode-study
Nov 2025 – Jan 2026
3 Months active
Languages Used
Java
Technical Skills
JavaJava programmingalgorithm designalgorithm developmentdata structuresdynamic programming
junyoungKim
PROFILE
Junyoungkim
Over three months, Dale contributed to the DaleStudy/leetcode-study repository by developing ten algorithmic features in Java, focusing on practical utilities for data structures and problem solving. Dale implemented reusable solutions for string manipulation, array operations, and dynamic programming, such as anagram checks, palindrome validation, and climbing stairs solvers. The work included binary search algorithms, linked list merging, binary tree depth calculations, and a 32-bit bit reversal function, each designed for clarity and maintainability. By emphasizing deterministic output and efficient logic, Dale’s contributions enhanced code reliability and provided a robust foundation for interview preparation and future algorithmic development.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
21Total
Bugs
0
Commits
21
Features
10
Lines of code
410
Activity Months3
Your Network
251 people
Work History
January 2026
3 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — DaleStudy/leetcode-study: Delivered a consolidated and optimized 32-bit Bit Reversal Function, with core reversal implemented, a fixed-loop structure for predictable output, and simplified logic to boost efficiency and reliability. This work enhances performance of 32-bit reversal routines used across the project and reduces edge-case bugs. The initiative involved three commits across the period, reinforcing high-quality, maintainable code and preparing groundwork for future optimizations in bit-level utilities. Business value: improved reliability of bit-level operations in the study tooling, reduced debugging time, and a foundation for further performance enhancements.
3 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — DaleStudy/leetcode-study: Delivered a consolidated and optimized 32-bit Bit Reversal Function, with core reversal implemented, a fixed-loop structure for predictable output, and simplified logic to boost efficiency and reliability. This work enhances performance of 32-bit reversal routines used across the project and reduces edge-case bugs. The initiative involved three commits across the period, reinforcing high-quality, maintainable code and preparing groundwork for future optimizations in bit-level utilities. Business value: improved reliability of bit-level operations in the study tooling, reduced debugging time, and a foundation for further performance enhancements.
January 2026
December 2025
11 Commits • 6 Features
Dec 1, 2025December 2025 monthly summary for DaleStudy/leetcode-study. This period focused on delivering core algorithmic features across data structures and problem-solving patterns, with an emphasis on practical interview prep utilities and measurable business value for developers preparing for technical assessments. No explicit major bugs were reported in this repository during the month; the work primarily advanced the capability and coverage of common algorithmic topics. Key outcomes include expanded problem-solving primitives, improved code quality, and reusable patterns for rapid interview practice. Key achievements (top 5): - Linked List Utilities: Merge Two Sorted Lists — Merged two sorted linked lists into a single sorted list. Commits: 76b63ad81ebf9b3185d60ce36f380e52416eae25 - Binary Tree Depth Calculations — Added support for computing maximum depth of a binary tree with TreeNode class and recursive/subtree-depth approaches. Commits: 934a0afa587915690188d9b9788ae6be5bcd5aab, 5f7a92b2aeb829e64921abf226ed34a74c2c3c46, b7ad44ac6993847932ec1e8254efe5584359d15b - Binary Search in Rotated Sorted Array — Implemented binary search to find the minimum element in a rotated sorted array for efficient lookup. Commit: ada0cc442c44189df6475ce48d77cbc2a7739381 - Word Search — Solved Word Search using DFS on a 2D board to determine if the word exists. Commit: f7408cbafac849bbb50ce2802f5d7195ecfd2891 - Coin Change DP — Dynamic programming solution to determine the minimum number of coins needed for a given amount. Commits: e87f7d4ddb6dff2c8bd65eafd9ad89d24c298c96, 871b0ed28a5ec828133ee2c07c3141bb48fdf6ec Overall, the month delivered substantial technical depth across core algorithms, enhanced testability, and reusable patterns for rapid practice. The work helps developers demonstrate proficiency in data structures and algorithm design, accelerating interview readiness and coding confidence.
December 2025
11 Commits • 6 Features
Dec 1, 2025December 2025 monthly summary for DaleStudy/leetcode-study. This period focused on delivering core algorithmic features across data structures and problem-solving patterns, with an emphasis on practical interview prep utilities and measurable business value for developers preparing for technical assessments. No explicit major bugs were reported in this repository during the month; the work primarily advanced the capability and coverage of common algorithmic topics. Key outcomes include expanded problem-solving primitives, improved code quality, and reusable patterns for rapid interview practice. Key achievements (top 5): - Linked List Utilities: Merge Two Sorted Lists — Merged two sorted linked lists into a single sorted list. Commits: 76b63ad81ebf9b3185d60ce36f380e52416eae25 - Binary Tree Depth Calculations — Added support for computing maximum depth of a binary tree with TreeNode class and recursive/subtree-depth approaches. Commits: 934a0afa587915690188d9b9788ae6be5bcd5aab, 5f7a92b2aeb829e64921abf226ed34a74c2c3c46, b7ad44ac6993847932ec1e8254efe5584359d15b - Binary Search in Rotated Sorted Array — Implemented binary search to find the minimum element in a rotated sorted array for efficient lookup. Commit: ada0cc442c44189df6475ce48d77cbc2a7739381 - Word Search — Solved Word Search using DFS on a 2D board to determine if the word exists. Commit: f7408cbafac849bbb50ce2802f5d7195ecfd2891 - Coin Change DP — Dynamic programming solution to determine the minimum number of coins needed for a given amount. Commits: e87f7d4ddb6dff2c8bd65eafd9ad89d24c298c96, 871b0ed28a5ec828133ee2c07c3141bb48fdf6ec Overall, the month delivered substantial technical depth across core algorithms, enhanced testability, and reusable patterns for rapid practice. The work helps developers demonstrate proficiency in data structures and algorithm design, accelerating interview readiness and coding confidence.
November 2025
7 Commits • 3 Features
Nov 1, 2025November 2025 monthly summary for DaleStudy/leetcode-study focusing on delivering practical algorithm utilities and problem solvers with reusable quality and clear commit traceability. Implementations span string processing utilities, array problem solvers, and DP/data-structure helpers, designed to accelerate learning, enable reuse, and support future project efforts.
7 Commits • 3 Features
Nov 1, 2025November 2025 monthly summary for DaleStudy/leetcode-study focusing on delivering practical algorithm utilities and problem solvers with reusable quality and clear commit traceability. Implementations span string processing utilities, array problem solvers, and DP/data-structure helpers, designed to accelerate learning, enable reuse, and support future project efforts.
November 2025
Activity
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Quality Metrics
Correctness93.4%
Maintainability88.6%
Architecture85.6%
Performance88.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
JavaJava programmingalgorithm designalgorithm developmentbinary searchbinary treesdata structuresdepth-first searchdynamic programminglinked listsproblem solvingstring manipulation
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