needs random tests.

In python, the initial solution shouldn't include //, as the comment sign is a hashtag, #.

Fixed

Go: missing package declaration in the initial solution.

Some tests look incorrect, like 6 31750 1 24165: 31750 should equal 55915. The lines are adjacent, how is the result the sum?..

You have to update the description. It's extremely hard to read without any linebreaks.

Also, consider adding some markdown to make it look nicer.