In the place of "Find the sum of all products whose...", I would say: "Find the number of all products whose..." ;-)
Why  instead of 0?
Since I have kludged a solution together, can I have a hint?
this solution works on my comupter
I see the first test command line is corrupted
:( :( :(
I've fixed that first line in the test suite. Try it again.
Swap the first and last columns
Count from 0 to N^M in base N.
Return elements unique to either input
Rotate a Matrix by 90 degrees
Divisors for big integer
Mirror, mirror on the wall, who is fairest of them all?
Can you beat the lottery again (for hardcore coder) ?
BLOCK x3 (Version 4)
Narcissistic number ?
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