It needs more than one test
agree! it is easy to cheat!
to easy to cheat
The only valid excuse for cheating is when the test suite is broken since we cannot fix it. Kobayashi Maru.
Sums with Excluded Digits
Sum of first n positive integers
Create a matrix X, where each column is a shifted copy of the vector v
vectorization in N
Matrix with different incremental runs
First non-zero element in each column
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