Step 1️⃣: Fork the repository.
Step 2️⃣: Goto problems folder.
Step 3️⃣: Then goto solutions folder.
Step 4️⃣: Inside you name folder, create a folder by name of Assignment No.
Step 5️⃣: Create a file inside the folder you created in step 4.
Step 6️⃣: Copy and Paste the code you have written, in file created in step 5.
Step 7️⃣: Then create a pull request.