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.
Find state names that end with the letter A
Make a random, non-repeating vector.
Create a vector whose elements depend on the previous element
Who invented zero?
Free passes for everyone!
Kurchan 4x4 - Optimal score
With apologies to William Blake
How many days?!?
Rolling maximums above a threshold
Reindex a vector
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