The first test case is wrong 0 and 21 are triangular numbers too (https://oeis.org/A000217), therefore:
[ 0, 6;
PS: And 0 does not make a pair with every number in this case.
What's wrong with the case x=20 in test suite? Why is y_correct=[ 10 10] ? I cannot pass it.
I don't know why your cheat isn't working, but look closely at what numbers your "for n=1:N" loop generates for that case.
Determine if input is odd
All your base are belong to us
Sum of first n terms of a harmonic progression
Number of digits in an integer
Check that number is whole number
Muphry's Law of MATLAB
Why the heck are they blinking!?!?
Now 20% off!
Sleeping Queens 1
Decimation - Optimized for speed
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