Commit Graph

1003 Commits

Author SHA1 Message Date
ananya-research
8ca2d9f820 Create zero_one_bfs.java (#6560)
* Create zero_one_bfs.java

* Rename zero_one_bfs.java to ZeroOneBfs.java

* Update ZeroOneBfs.java

* Update ZeroOneBfs.java

* Create ZeroOneBfsTest.java

* Update ZeroOneBfsTest.java

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Co-authored-by: a <alexanderklmn@gmail.com>
2025-10-06 20:14:32 +02:00
Priyanshu Kumar Singh
9484c7eead FEAT(geometry): Add Haversine formula and fix build issues (#6650)
[FEAT] Implemented Haversine Formula

Co-authored-by: Priyanshu1303d <priyanshu130d@gmail.com>
2025-10-05 20:28:06 +02:00
Banula Kumarage
e6cb96f390 Dev: Added CoordinateConverter for Cartesian and Polar coordinate conversions (#6628)
Added CoordinateConverter utility class for Cartesian and Polar coordinate conversions
2025-10-05 14:26:13 +03:00
Banula Kumarage
a0b6c52790 Dev: Added algorithm to find the nth number in the Sylvester Sequence (#6613)
Added algorithm to find the nth number in the SylvesterSequence
2025-10-04 15:56:08 +02:00
Banula Kumarage
6d5170999a Dev: Added NumberPersistence utility class to find multiplicative and additive persistance (#6612)
* Add NumberPersistence utility class with multiplicative and additive persistence methods

* Fixed identified style issues
2025-10-04 12:55:26 +02:00
JeevaRamanathan
7e29be3ad8 Added isogram utility class and unit tests (#6594)
* added isogram utility class and unit tests

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* checking lint issue

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* linter fix

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* fix: HideUtilityClassConstructor

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* linter fix

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* updated isogram class to final

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* pipeline bug fixing

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

* renamed function names and few fixes w.r.t to suggestion

Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>

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Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>
2025-10-03 14:33:12 +03:00
Yash Rajput
8d14b492fd Added CountBitsFlip algo (#6603)
* Added CountBitsFlip aldo

* checkstyle fix

* checkstyle fix

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Co-authored-by: Alx <alexanderklmn@gmail.com>
2025-10-03 12:52:53 +03:00
Banula Kumarage
506b6d1ab2 DEV: Implementing Time Conversion Algorithm (#6556)
* Added-time-converter-algorithm

* Updated-java-docs

* Fixed-formatting-issues

* Enhanced-unit-tests

* Fixed-failing-check-style

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-10-02 18:31:19 +00:00
Anubhav
977c982904 Add Minimum Window Substring algorithm in Sliding Window package (#6553)
* Create MinimumWindowSubstring.java

* Create MinimumWindowSubstringTest.java

* correct MinimumWindowSubstringTest.java

* Added more test cases

* Update MinimumWindowSubstringTest.java

* Update MinimumWindowSubstringTest.java

* Update MinimumWindowSubstringTest.java

* Update MinimumWindowSubstringTest.java

* Update MinimumWindowSubstringTest.java

* Update MinimumWindowSubstringTest.java

* Added test case "AAABBC" "AABC"

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-10-02 20:25:48 +02:00
Nithin U
2be984fdf5 To add Implementation of Base64 Algorithm (#6586)
* feat: base64 algorithm implementation

* feat: test coverage implementation of Base64Test.java

* Update DIRECTORY.md

* fix: build and lint fix update

* patch: linter fix

* fix: enforce strict RFC 4648 compliance in Base64 decoding

* fix: enforce strict rfc 4648 compliance in base64 decoding

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Co-authored-by: Oleksandr Klymenko <alexanderklmn@gmail.com>
2025-10-02 19:57:14 +02:00
Sriram kulkarni
d8ddb07b7e Added Sum of Squares Lagrange's Four Square algorithm implementation (#6583)
* Add Sum of Squares algorithm implementation

* Format code and add Wikipedia URL for Lagrange's theorem

* Fixed clang-format issues

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Co-authored-by: Oleksandr Klymenko <alexanderklmn@gmail.com>
2025-10-02 10:44:36 +03:00
Sourav Saha
15695c6e54 Fix MiniMaxAlgorithm setScores bug and add comprehensive tests (#6566)
* Fix MiniMaxAlgorithm setScores bug and add comprehensive tests

- Fix bug in setScores method where scores.length % 1 == 0 always returned true
- Add isPowerOfTwo helper method to properly validate array length
- Add comprehensive unit tests covering edge cases and algorithm correctness
- Tests include validation for power of 2 check, minimax logic, and error handling

Fixes issue with incorrect validation logic in MiniMaxAlgorithm.setScores()

* Fix Checkstyle violations and improve setScores validation

- Replace star imports with explicit imports in test file
- Remove trailing whitespaces from all lines
- Add proper file ending newline
- Improve setScores method to handle edge cases properly
- Use direct bit manipulation for power-of-2 check as suggested
- Ensure error message is printed and scores remain unchanged for invalid input

All Checkstyle violations resolved and tests pass successfully.

* Add missing newline at end of MiniMaxAlgorithmTest.java

- Fix Checkstyle violation: NewlineAtEndOfFile
- Ensure file ends with proper newline character
- All tests continue to pass successfully

* Fix PMD violation by utilizing isPowerOfTwo method

- Replace inline bit manipulation with isPowerOfTwo method call
- Resolves PMD UnusedPrivateMethod violation
- Maintains same validation logic and error handling
- All tests continue to pass successfully

* test: improve MiniMaxAlgorithm test coverage for CodeCov

- Add comprehensive test cases for isPowerOfTwo function edge cases
- Test setScores method with various invalid array lengths (0, 3, 5, 6, 7, 9, 10, 15)
- Add tests for large valid powers of 2 (up to 64 elements)
- Ensure complete coverage of error handling branches
- Increase test count from 14 to 19 tests
- Fix partial coverage issues identified in CodeCov report

Resolves CodeCov coverage gaps in MiniMaxAlgorithm.java

* Fix checkstyle errors

* Fix checkstyle errors

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Co-authored-by: ssaha <ssaha@wiley.com>
Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-10-02 09:24:25 +02:00
Sivasuthan Sukumar
f8f315eaa8 Extend Graph Algorithms: Added Two Popular Algorithms: BronKerbosch, EdmondsKarp (#6576)
* Bron–Kerbosch algorithm added.

* test:Bron–Kerbosch algorithm added.

* lint checked.

* clang-format linting checked.

* lint checked in remote

Removed duplicate import statements for assertions.

* Remove unnecessary blank line in BronKerboschTest

* EdmondsKarp algorithm added.

* reformatted

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Co-authored-by: Oleksandr Klymenko <alexanderklmn@gmail.com>
2025-10-01 21:44:43 +02:00
Kunwar Partap Singh
05ceb192c9 Bit swap enhancement (#6577) 2025-10-01 21:35:05 +02:00
Richa Kiran
5e9d9f7337 Added Circular Doubly Linked List in the datastructures section (#6565) 2025-10-01 15:59:15 +03:00
Piotr Idzik
421ac6d74f style: include RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE (#6559) 2025-10-01 09:06:50 +02:00
Milad Sadeghi
ef681e844d DEV: Implementing Alternative String Arrange (#6551) 2025-09-29 13:13:50 +03:00
Hetu Kariya
fb12971fd6 Added BitwiseGCD.java and BitwiseGCDTest.java (#6545) 2025-09-27 13:02:34 +02:00
Rahul P
5fee204773 Added PriorityQueueSort algorithm and Tests (#6532)
* Added PriorityQueueSort.java

Implemented PriorityQueueSort using Java's PriorityQueue (Min-Heap).
- Returns the array sorted in ascending order
- Time complexity: O(n log n)
- Space complexity: O(n)

* Added tests for PriorityQueueSort

* Update PriorityQueueSortTest.java

* Fixed formatting and added full coverage tests for PriorityQueueSort

* Update PriorityQueueSort.java

* Update PriorityQueueSort.java

* Update PriorityQueueSort.java

* Update PriorityQueueSortTest.java

* Update PriorityQueueSort.java

* Update PriorityQueueSort.java

* Update PriorityQueueSort.java

* Fix formatting with clang-format
2025-09-18 20:02:15 +02:00
Nithin U
85a2df46ad To add Suffix array algorithm implementation (#6530)
* adding Suffix Array Implementation

* adding test for Suffix Array

* patch: lint fix in SuffixArray.java

* patch: lint fix in SuffixArrayTest.java

* fix: private constructor update

* patch: lint fix in suffix array impl

* fix: lint issue line blankspace removal

* fix: checkstype issue

* fix: lint format issue

* Update DIRECTORY.md
2025-09-17 17:56:10 +02:00
Priyansh
1393f5ea6b Added-> DisjointUnion Set by Size (#6514)
* Added-> DisjointUnion Set by Size

* Add tests for DisjointSetUnionBySize

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-09-03 19:05:12 +02:00
Nihar Kakani
27ada8a649 Migrate recursive reverse string method and tests to ReverseString (#6504)
* Migrate recursive reverse string method and tests to ReverseString

- Moved recursive reverse method from ReverseStringRecursive.java to ReverseString.java
- Moved tests from ReverseStringRecursiveTest.java to ReverseStringTest.java
- Deleted old ReverseStringRecursive files

* Fix formatting for ReverseStringTest.java as per clang-format linter
2025-08-27 16:59:04 +02:00
Vicky
3961b1dab9 fix: revert ReverseStack deletion and verify linting (#6474) (#6494)
* fix: revert ReverseStack deletions and ensure lint compliance

* Fix formatting for ReverseStack and test files

* Delete ReverseStackUsingRecursion and its test as requested

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-08-22 07:41:36 +02:00
Deniz Altunkapan
6c24d27b03 Move methods from others to correct packages (#6475)
refactor: Move methods from `others` package to their respective packages
2025-08-18 22:28:19 +02:00
Stathis Veinoglou
2dd6a13707 Add DFS with parent-completion constraint for DAG traversal (#6467)
* Add DFS with parent-completion constraint for DAG traversal

* warning in PartitionProblem.java affecting tests

* added clang-format and updated javadoc

* optimized imports and rechecked camelCase format in tests

* removed .* import and made small visual change

* replaced a inline return with correct {} block

* Removed changed in PartitionProblem.java, Renamed class name to be straightforward about the implementation.Added full names instead of shortcuts, and included record.

* updated for clang format

---------

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-08-15 16:41:52 +00:00
ptzecher
657f433413 Hopcroft karp Algorithm implementation and tests (#6465)
* Add Hopcroft-Karp algorithm and tests

* Adding wikipedia url for Algorithm

* fixing test issues

* remove unused field flagged by PMD
2025-08-14 19:42:51 +02:00
Navaneedan S
e09c98578f Add ReverseStringUsingStack (#6452)
* Refactored ReverseStringUsingStack
* Add ReverseStringUsingStack
* Refactored ReverseStringUsingStack
* Closes #6451
2025-08-01 21:16:10 +02:00
dinishajais
a8b579e293 #6336/enhancement/Refactor: Standardize comparison logic using SortUtils (#6442)
* Refactoring compareTo() to SortUtils methods

* Adding formatting

* Removed excess parenthesis

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-26 08:37:54 +00:00
Lucas Gomes
2eb80fb843 Remove duplicate SimpleSort (same logic as ExchangeSort) (#6441)
* Remove duplicate SimpleSort (same logic as ExchangeSort)

* Removed test class for SimpleSort as it was also duplicate

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Co-authored-by: Lucas G <lucasgomesm1808@gmail.com>
2025-07-26 10:34:00 +02:00
Vishwajeet Deshmane
cfd784105b Feat(Improved): Add 0/1 Knapsack Problem: Recursive and Tabulation (Bottom-Up DP) Implementations in Java along with their corresponding Tests (#6425)
* feat: Add 0/1 Knapsack and its tabulation implementation with their corresponding tests

* feat: Add 0/1 Knapsack and its tabulation implementation with their corresponding tests

* feat: Add 0/1 Knapsack and its tabulation implementation with their corresponding tests

* Feat:add 0/1knapsack and 0/1knapsacktabulation along with their tests

* Feat:add 0/1knapsack and 0/1knapsacktabulation along with their tests

* Feat:add 0/1knapsack and 0/1knapsacktabulation along with their tests

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Co-authored-by: Oleksandr Klymenko <alexanderklmn@gmail.com>
2025-07-22 19:17:24 +02:00
IDDQD
c9cc8f4698 Add cache with LIFO replacement policy (#6390)
* Added Random Replacement cache

* Implement cache with LIFO replacement policy

* Ran clang-format

* Make necessary variables final, replace HashMap.newHashMap(int capacity) with new HashMap<>(int capacity)

---------

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-21 18:11:13 +02:00
Nishitha Wihala
2dfad7ef8f Add matrix multiplication with double[][] and unit tests (#6417)
* MatrixMultiplication.java created and updated.

* Add necessary comment to MatrixMultiplication.java

* Create MatrixMultiplicationTest.java

* method for 2 by 2 matrix multiplication is created

* Use assertMatrixEquals(), otherwise there can be error due to floating point arithmetic errors

* assertMatrixEquals method created and updated

* method created for 3by2 matrix multiply with 2by1 matrix

* method created for null matrix multiplication

* method for test matrix dimension error

* method for test empty matrix input

* testMultiply3by2and2by1 test case updated

* Check for empty matrices part updated

* Updated Unit test coverage

* files updated

* clean the code

* clean the code

* Updated files with google-java-format

* Updated files

* Updated files

* Updated files

* Updated files

* Add reference links and complexities

* Add test cases for 1by1 matrix and non-rectangular matrix

* Add reference links and complexities

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-21 16:07:13 +00:00
Oleksandr Klymenko
31bf130e9e refactor: improving Median (#6404)
refactor: improving Median

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-20 08:21:46 +00:00
Oleksandr Klymenko
434ab50ff4 refactor: Convolution (#6382)
refactor: Convolution

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-16 15:05:13 +00:00
Oleksandr Klymenko
d55e89dc71 refactor: Mode (#6381)
refactor: Mode
2025-07-16 17:02:16 +02:00
Oleksandr Klymenko
dcb02c61df refactor: MajorityElement (#6380)
* refactor: MajorityElement

* refactor: fix import ordering

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-15 17:10:06 +02:00
Oleksandr Klymenko
287a708c7f refactor: Intersection (#6379)
refactor: Intersection improvement
2025-07-15 17:04:58 +02:00
Oleksandr Klymenko
ca7c77f16b refactor: improving DisjointSetUnion (#6378)
* refactor: improving DisjointSetUnion

* refactor: remove comment as it already in description

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-15 05:31:09 +00:00
Oleksandr Klymenko
7e37d94c53 refactor: improving readability DecimalToAnyUsingStack (#6377)
refactor: improving readability DecimalToAnyUsingStack

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-15 05:26:49 +00:00
Oleksandr Klymenko
95116dbee4 refactor: improving MedianOfMatrix (#6376)
refactor: improving MedianOfMatrix
2025-07-15 07:23:49 +02:00
Oleksandr Klymenko
25aaa6e064 refactor: OnesComplement Tests Using Parameterized Inputs (#6375)
refactor: OnesComplement Tests Using Parameterized Inputs

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-14 05:51:17 +00:00
Oleksandr Klymenko
933e929b54 refactor: refactor Ceil and improved tests (#6366)
* refactor: refactor Ceil and improved tests

* checkstyle: remove redundant import

* refactor: fix edge cases

* refactor: fix checkstyle

* refactor: fix checkstyle import order
2025-07-14 07:47:22 +02:00
Oleksandr Klymenko
ef93cc1503 refactor: TwoPointers (#6374)
* refactor: TwoPointers

* refactor: fix test formatting

* refactor: fix checkstyle

* refactor: fix checkstyle
2025-07-13 09:25:26 +00:00
Oleksandr Klymenko
182118b6a4 refactor: cleanup GenerateSubsets (#6373)
refactor: cleanup GenerateSubsets

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-13 09:17:38 +00:00
Oleksandr Klymenko
910d5b880a refactor: Refactor SJFScheduling and Tests (#6372)
* refactor: Refactor SJFScheduling and Tests

* refactor: fix checkstyle

* refactor: add full imports

* refactor: add full imports

* refactor: remove redundant newline

* refactor: fix indexed list iteration
2025-07-13 11:11:57 +02:00
Oleksandr Klymenko
dba2d869f2 refactor: improving GenericRoot (#6365)
refactor: improving GenericRoot
2025-07-12 06:51:49 +00:00
Oleksandr Klymenko
7590d8234f refactor: add JavaDocs and improve readability in InfixToPrefix (#6363)
* refactor: add JavaDocs and improve readability in InfixToPrefix

* formatting: remove redundant newline

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-12 06:47:49 +00:00
Oleksandr Klymenko
acb4753d65 refactor: Improve readability and code clarity in InfixToPostfix (#6362)
refactor: improve InfixToPostfix

Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-12 08:44:57 +02:00
Oleksandr Klymenko
0a4f5542d9 cleanup: Improve docs, safety, and readability in RangeInSortedArray (#6361)
* cleanup: Improve docs, safety, and readability in RangeInSortedArray

* formatting: fix comment formatting issue

* formatting: fix array formatting issue

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-11 19:42:45 +00:00
Oleksandr Klymenko
048bba9499 refactor: adding docs for LongestCommonPrefixTest and Parameterized Tests (#6360)
* refactor: adding docs for LongestCommonPrefixTest and Parameterized Tests

* checkstyle: fix clang formatting

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Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
2025-07-11 19:39:33 +00:00