Problem 322. Number of Circles in a Number

Created by @bmtran

Given a number, return the number of closed 'circles' in the base 10 numerical representation.

Note: the number 4 has no circles

Example:

    8819 -> 5

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54 solvers submitted 114 solutions (2.11 solutions/solver).

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Peter Wittenberg on 8 Apr 2012

Interpolating on a string (the ASCII values) is an interesting idea even though the long interpolation string could be reduced by subtracting '0', but at the expense of a "longer" solution.

Problem 322. Number of Circles in a Number

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54 solvers submitted 114 solutions (2.11 solutions/solver).

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