Problem 656. Calculate Euler's phi function

Suggested Problems

• Longest run of consecutive numbers

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• Get the elements of diagonal and antidiagonal for any m-by-n matrix

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• Return 'on' or 'off'

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• Area of an equilateral triangle

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• Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.

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