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+# Lab 3: Git
+
+## Deliverables:
+You will perform three tasks in this exercise. 
+
+- [ ] Create and fix a merge conflict
+- [ ] Amend a commit
+- [ ] Create and approve a pull request
+
+It is strongly recommended that you use a git extension for your IDE to complete this lab. If you are using Visual Studio Code, you can use the [GitLens](https://marketplace.visualstudio.com/items?itemName=eamodio.gitlens) extension. 
+
+## Setup
+1. Fork [this](https://github.com/mlip-cmu/s2024) repository to your GitHub account.
+2. Clone the forked repository to your local machine by running the following command in the terminal:
+```
+git clone -n --depth=1 --filter=tree:0 <your repo url>
+cd pytorch
+git sparse-checkout set --no-cone exams
+git checkout
+```
+3. Open the repository in your IDE.
+
+## Exercise 1: Create and fix a merge conflict
+
+1. Create a new branch called `merge-conflict` from `main` branch.
+2. Open the `exams/README.md` file, navigate to the `Practice Material` function (line 9) and change the resizing mode from `nearest` to `bilinear`:
+3. Commit the changes to the `merge-conflict` branch. Make sure you add a meaningful commit message.
+4. Switch back to `main` branch.
+5. Open the `torch/nn/functional.py` file, navigate to the `interpolate`(line 3856) function and change the resizing mode from `nearest` to `bicubic` and `align_corners` to `True`:
+6. Commit the changes to the `main` branch. Make sure you add a meaningful commit message.
+7. Merge the `merge-conflict` branch into the `main` branch.
+8. Resolve the merge conflict by keeping the resizing mode `bilinear` and `align_corners` `True`.
+9. Commit the changes to the `main` branch. Make sure you add a meaningful commit message.
+
+## Exercise 2: Amend a commit
+
+1. Create a new branch called `amend-commit` from `main` branch.
+2. In the `torch/nn/functional.py` file, navigate to the `multi_margin_loss` function (line 3566) and change the margin to 1.5 and reduction mode to `sum'
+3. Commit the changes to the `amend-commit` branch. Make sure you add a meaningful commit message.
+4. Amend the commit by changing the margin to 2.0
+5. Commit the changes to the `amend-commit` branch. Make sure you add a meaningful commit message.
+
+## Exercise 3: Create and approve a pull request
+
+1. Create a new branch called `pull-request` from `main` branch.
+2. In the `torch/nn/functional.py` file, navigate to the `l1_loss` function (line 3308) and add code to check if the reduction mode is `sum` and raise an exception:
+3. Commit the changes to the `pull-request` branch. Make sure you add a meaningful commit message.
+4. Push the `pull-request` branch to the remote repository.
+5. Create a pull request to merge the `pull-request` branch into the `main` branch.
+6. Approve the pull request.
+7. Merge the `pull-request` branch into the `main` branch.
+
+
+
+## Useful commands
+
+- `git checkout -b <branch-name>` - creates a new branch and switches to it
+- `git checkout <branch-name>` - switches to the specified branch
+- `git merge <branch-name>` - merges the specified branch into the current branch
+- `git status` - shows the status of the current branch
+- `git add <file-name>` - adds the specified file to the staging area
+- `git commit -m "<commit-message>"` - commits the staged changes with the specified commit message
+- `git log` - shows the commit history
+- `git log --oneline` - shows the commit history with each commit on a single line
+- `git log --oneline --graph` - shows the commit history with each commit on a single line and the branches graph
+- `git push origin <branch-name>` - pushes the specified branch to the remote repository
+- `git pull origin <branch-name>` - pulls the specified branch from the remote repository
+- `git branch -d <branch-name>` - deletes the specified branch
+- `git commit --amend` - amends the last commit
+- `git push origin --delete <branch-name>` - deletes the specified branch from the remote repository
+
+
+## Resources
+- [Git Handbook](https://guides.github.com/introduction/git-handbook/)
+- [Git Cheat Sheet](https://education.github.com/git-cheat-sheet-education.pdf)
+- [Git Documentation](https://git-scm.com/doc)
+- [Git Exercises](https://gitexercises.fracz.com/)
+