@Vipresh Gangwal: there is no need to publish test problems. You can click the Unpublish button on the problem's edit page to remove it from public view until it is complete. Also, you can, and should, supply a reference solution and use the "Test reference solution" button on the edit page to ensure that the problem is solvable and properly functioning before it is published.
Make a run-length companion vector
Calculate the area of a triangle between three points
Add two numbers
07 - Common functions and indexing 4
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