Given a number, return the number of closed 'circles' in the base 10 numerical representation.
Note: the number 4 has no circles
8819 -> 5
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.
Rotate input square matrix 90 degrees CCW without rot90
Cell Counting: How Many Draws?
Next Higher Power of B
kmph to mps
05 - Vector Equations 3
Number of 1s in the Binary Representation of a Number
Great Circle Distance
English to Pig Latin Translator
THE CALCULATOR OF LOVE
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