Sign error in the statement of the problem?
Find the sum of the elements in the "second" diagonal
Numbers with prime factors 2, 3 and 5.
Scoring for oriented dominoes
Cell Counting: How Many Draws?
Create an n-by-n null matrix and fill with ones certain positions
Have you seen any Spindromes recently?
Check if sorted
How many jokers?
Compress strings (not springs)
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