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.
Who Has the Most Change?
Solve the Sudoku Row
Project Euler: Problem 9, Pythagorean numbers
Is this matrix orthogonal?
Calculate the derivative of a polynomial
Mr. Pyramidad & Ms. Whissy Bolower
Given a square and a circle, please decide whether the square covers more area.
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