Neat kata. I did look up the formula however.

oh ok, thanks a lot

For SQL katas, you shouldn't create functions, normally it's just a select statement what you should write:

--# write your SQL statement here:

-- you are given a table 'sumtriangular' with column 'n'

-- return a table with this column and your result in a column named 'res'.

I do not understand how to submit it properly in postgresql. I created a function but sample data does not see it. It is working only if I manually SELECT * FROM function. What should I do?

It is written in the description as " your task is to find the largest possible product between four adjacent numbers in the same direction" (emphasis mine). You think it is not clear enough?

About the sizes of the matrices, you are right. Throwing large matrices at users tends to result in a poor feedback, and there are ways to make it better. Apparently, the author (or translator) could not be bothered. You can rise the poor quality of feedback on failure as an issue, and it will be hopefully handled some day, by someone :)

1st. Did i miss or in description nothing said about multiplier of 4 biggest numbers in a row(horizontal, vertical or diagonal.)
2dn. It is so hard to test arr 66 by 66 numbers.
Now i googling how to fitt it in my code editor screen, to bee grid like. you write code for 4 by 4 and 6 by 6, and then baaam 66*66. Nice

Fixed.

What's with all these kata lately requiring complex mathematical theory and not including the calculation? bro, I just want to code

fixed in OP's fork

Approved

python new test framework is required. updated in this fork

Python :
You will be given n, a number between 0 and 300

solutions are tested upto n<=200 only.

In PHP:

• Actual and expected are swapped

• NO fixed tests

=)

Read this then: https://docs.codewars.com/training/training-example