Tip: This kind of problem that seems incredibly hard usually have a formula (someone already researched this). Find the formula, and solve the problem.
Times 2 - START HERE
Make a checkerboard matrix
Reverse the elements of an array
Find the index of n in magic(n)
Flip the vector from right to left
Find: Faster Alternatives for Large Sorted/Unique Vectors
Kaggle: Planetoid Game of Life - Variable Iterations for a wrapping array
GJam 2011 Africa Qualifier C: House, maximum area rectangle
Pandiagonal Prime Magic Square Verification
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