let wolf() make one or two steps to get a feel of the beat, it is waltz, do not let wolf() make the third step, return safely just before the third beat should fall, do not be too fast or too slow.
Project Euler: Problem 7, Nth prime
Return the 'Size' of a String of Code
Return the Fibonacci Sequence
Rotate a Matrix by 90 degrees
Add more zeros
Given a square and a circle, please decide whether the square covers more area.
Looking for Squares
Basic electricity in a dry situation
How to subtract?
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