Hardik Pawar

The **Merge Sort for Linked List** algorithm sorts a linked list by recursively dividing it into two halves, sorting each half, and then merging the sorted halves back together. It...

### Describe your change: The **Activity Selection Problem** is a classic **greedy algorithm** problem. Given a list of activities, each with a start and end time, the goal is to...

Improve comments, add doctests to coloring.py

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Added more comprehensive comments and more doctests to each function present in `coloring.py`. * [ ] Add an algorithm? * [ ] Fix a bug or typo in an existing...

Add `PrefixToInfix.java` new algorithm

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...

Add `MedianOfTwoSortedArrays.java` new algorithm

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...

Add function documentation in `Sudoku.java`

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...

Add `Infix To Prefix` new algorithm with unit tests

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...

Add tests for `ClosestPair.java`

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...

Add tests for `SkylineAlgorithm.java`

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...

Add `NonPreemptivePriorityScheduling` new algorithm with unit tests

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- [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Java/blob/master/CONTRIBUTING.md). - [x] This pull request is all my own work -- I have not plagiarized it. - [x] All filenames are in PascalCase. -...