Compute bank note count

Main.luna

«0»def main:
    «4»inputAmount = 12345
    «2»values = [500, 200, 100, 50, 20, 10, 5, 2, 1]
    «26»mappingFunction = «28»computeSentenceForValue inputAmount values
    «29»computedForAll = values . each mappingFunction
    None

«6»def computeSentenceForValue inputAmount values value:
    «14»filteringPredicate = item:
        «15»item > value
        
    «10»sortedValues = values . sort
    «12»filteredValues = sortedValues . filter filteringPredicate
    «16»reversedValues = filteredValues . reverse
    «19»residuum = reversedValues . fold inputAmount nextResiduum
    «25»occurencesOfValueInResiduum = residuum./ value
    «20»residuum
    occurencesOfValueInResiduum

«21»def nextResiduum originalResiduum bankNoteValue:
    «22»occurences = originalResiduum / bankNoteValue
    «23»covered = occurences * bankNoteValue
    «24»originalResiduum - covered

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