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Algorithm. Conversion to base b representation.

Input:	a natural number a and a natural number b greater than 1
Output:	The digits r0, r1, r2,...,rn of the base b representation of a
	such that a = rn⋅bn +... + r2⋅b2 + r1⋅b + r0.

1. let i := (-1)
2. let q := a
3. repeat
   1. let i := i + 1
   2. let r_i := q mod b
   3. let q := q div b
4. until q = 0
5. return r₀,...,r_i