Justin's LeetCode Journey

A personal log of continuous algorithmic problem-solving, documenting my progression through daily LeetCode challenges and contest performances.

Report Bug * Request Feature

+-----------------------------------------------------------------------------+
|                     Continuous Problem Solving Workflow                     |
|                                                                             |
|  +-----------------------+  +-----------------------+  +-----------------+  |
|  | Daily Challenge       |  | Optimal Solution      |  | Pattern Sync    |  |
|  | Analysis & Modeling   |  | Implementation (Java) |  | to Repo Log     |  |
|  +----------+------------+  +----------+------------+  +--------+--------+  |
|             |                          |                        |           |
|             +--------------------------+------------------------+           |
|                                        v                                    |
|  +-----------------------------------------------------------------------+  |
|  |   Time/Space Complexity Profiling * Edge Case Testing * Refactoring   |  |
|  +-----------------------------------------------------------------------+  |
+-----------------------------------------------------------------------------+

Consistency is the ultimate algorithmic weapon. This repository serves as my personal accountability log and code archive for my LeetCode journey. It tracks my daily problem-solving habit, capturing my evolving thought processes, optimizations, and the specific algorithmic patterns I apply to each challenge.

Features

Daily Progression Log -- Chronological archive of solved problems, demonstrating consistent daily practice.
Iterative Optimization -- Includes multiple approaches to problems (e.g., transitioning from O(N^2) brute force to O(N log N) divide-and-conquer).
Extensive Java Utilization -- Solutions explore both legacy iterative logic and modern Java Stream API approaches.
Contest Submissions -- Contains code written under time-pressure during Weekly and Biweekly LeetCode contests.

Repository Structure

Justin-LeetCode-Journey/
|-- 2024/
|   |-- January/
|   |   |-- TwoSum.java
|   |   `-- BestTimeToBuyAndSellStock.java
|   `-- February/
|       `-- NumberOfIslands.java
`-- Contests/
    `-- Weekly_380/

(Note: Structure adapts dynamically based on daily submissions)

Getting Started

Prerequisites

Requirement	Version	Notes
Java JDK	17+	Java compiler and runtime

Running a Solution

To compile and run a specific solution file locally to test against custom inputs:

javac path/to/ProblemSolution.java
java path.to.ProblemSolution

License

Distributed under the MIT License. See LICENSE for details.

Name		Name	Last commit message	Last commit date
0003-longest-substring-without-repeating-characters		0003-longest-substring-without-repeating-characters
0004-median-of-two-sorted-arrays		0004-median-of-two-sorted-arrays
0014-longest-common-prefix		0014-longest-common-prefix
0017-letter-combinations-of-a-phone-number		0017-letter-combinations-of-a-phone-number
0031-next-permutation		0031-next-permutation
0033-search-in-rotated-sorted-array		0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array		0034-find-first-and-last-position-of-element-in-sorted-array
0049-group-anagrams		0049-group-anagrams
0054-spiral-matrix		0054-spiral-matrix
0058-length-of-last-word		0058-length-of-last-word
0076-minimum-window-substring		0076-minimum-window-substring
0118-pascals-triangle		0118-pascals-triangle
0119-pascals-triangle-ii		0119-pascals-triangle-ii
0151-reverse-words-in-a-string		0151-reverse-words-in-a-string
0169-majority-element		0169-majority-element
0205-isomorphic-strings		0205-isomorphic-strings
0209-minimum-size-subarray-sum		0209-minimum-size-subarray-sum
0219-contains-duplicate-ii		0219-contains-duplicate-ii
0240-search-a-2d-matrix-ii		0240-search-a-2d-matrix-ii
0290-word-pattern		0290-word-pattern
0344-reverse-string		0344-reverse-string
0349-intersection-of-two-arrays		0349-intersection-of-two-arrays
0383-ransom-note		0383-ransom-note
0387-first-unique-character-in-a-string		0387-first-unique-character-in-a-string
0389-find-the-difference		0389-find-the-difference
0392-is-subsequence		0392-is-subsequence
0409-longest-palindrome		0409-longest-palindrome
0424-longest-repeating-character-replacement		0424-longest-repeating-character-replacement
0438-find-all-anagrams-in-a-string		0438-find-all-anagrams-in-a-string
0443-string-compression		0443-string-compression
0451-sort-characters-by-frequency		0451-sort-characters-by-frequency
0485-max-consecutive-ones		0485-max-consecutive-ones
0523-continuous-subarray-sum		0523-continuous-subarray-sum
0557-reverse-words-in-a-string-iii		0557-reverse-words-in-a-string-iii
0560-subarray-sum-equals-k		0560-subarray-sum-equals-k
0567-permutation-in-string		0567-permutation-in-string
0643-maximum-average-subarray-i		0643-maximum-average-subarray-i
0674-longest-continuous-increasing-subsequence		0674-longest-continuous-increasing-subsequence
0796-rotate-string		0796-rotate-string
1-two-sum		1-two-sum
11-container-with-most-water		11-container-with-most-water
12-integer-to-roman		12-integer-to-roman
125-valid-palindrome		125-valid-palindrome
13-roman-to-integer		13-roman-to-integer
134-gas-station		134-gas-station
14-longest-common-prefix		14-longest-common-prefix
1446-consecutive-characters		1446-consecutive-characters
1456-maximum-number-of-vowels-in-a-substring-of-given-length		1456-maximum-number-of-vowels-in-a-substring-of-given-length
15-3sum		15-3sum
1505-create-target-array-in-the-given-order		1505-create-target-array-in-the-given-order
151-reverse-words-in-a-string		151-reverse-words-in-a-string
1513-number-of-substrings-with-only-1s		1513-number-of-substrings-with-only-1s
1528-kids-with-the-greatest-number-of-candies		1528-kids-with-the-greatest-number-of-candies
1528-shuffle-string		1528-shuffle-string
1603-running-sum-of-1d-array		1603-running-sum-of-1d-array
1662-check-if-two-string-arrays-are-equivalent		1662-check-if-two-string-arrays-are-equivalent
167-two-sum-ii-input-array-is-sorted		167-two-sum-ii-input-array-is-sorted
1759-count-number-of-homogenous-substrings		1759-count-number-of-homogenous-substrings
1791-richest-customer-wealth		1791-richest-customer-wealth
1796-second-largest-digit-in-a-string		1796-second-largest-digit-in-a-string
189-rotate-array		189-rotate-array
2005-check-if-all-the-integers-in-a-range-are-covered		2005-check-if-all-the-integers-in-a-range-are-covered
205-isomorphic-strings		205-isomorphic-strings
2110-number-of-smooth-descent-periods-of-a-stock		2110-number-of-smooth-descent-periods-of-a-stock
2137-final-value-of-variable-after-performing-operations		2137-final-value-of-variable-after-performing-operations
217-contains-duplicate		217-contains-duplicate
2348-number-of-zero-filled-subarrays		2348-number-of-zero-filled-subarrays
238-product-of-array-except-self		238-product-of-array-except-self
242-valid-anagram		242-valid-anagram
26-remove-duplicates-from-sorted-array		26-remove-duplicates-from-sorted-array
27-remove-element		27-remove-element
274-h-index		274-h-index
28-find-the-index-of-the-first-occurrence-in-a-string		28-find-the-index-of-the-first-occurrence-in-a-string
283-move-zeroes		283-move-zeroes
3101-count-alternating-subarrays		3101-count-alternating-subarrays
35-search-insert-position		35-search-insert-position
383-ransom-note		383-ransom-note
392-is-subsequence		392-is-subsequence
3965-earliest-finish-time-for-land-and-water-rides-i		3965-earliest-finish-time-for-land-and-water-rides-i
3967-earliest-finish-time-for-land-and-water-rides-ii		3967-earliest-finish-time-for-land-and-water-rides-ii
45-jump-game-ii		45-jump-game-ii
485-max-consecutive-ones		485-max-consecutive-ones
55-jump-game		55-jump-game
58-length-of-last-word		58-length-of-last-word
6-zigzag-conversion		6-zigzag-conversion
66-plus-one		66-plus-one
81-search-in-rotated-sorted-array-ii		81-search-in-rotated-sorted-array-ii
LICENSE		LICENSE
README.md		README.md
stats.json		stats.json

Navigation Menu

Repository navigation

About

Repository files navigation

Justin's LeetCode Journey

Features

Repository Structure

Getting Started

Prerequisites

Running a Solution

License

About

Releases

Packages

Contributors

Languages

Latest commit

History

Folders and files

Repository files navigation

Justin's LeetCode Journey

Features

Repository Structure

Getting Started

Prerequisites

Running a Solution

License

About

Topics

Resources

Stars

Watchers

Forks

Releases

Packages

Contributors

Languages