The flipping sequence does not need to be the most efficient, it just needs to (eventually) have the desired effect.
Check to see if a Sudoku Puzzle is Solved
Is my wife right?
Determine Whether an array is empty
Determine if input is a perfect number
Simple equation: Annual salary
Arithmetic/geometric sequence, 50/50
Modify subscripts - easier
Alternative Scoring. Create an incremental spiral.
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