class Addition:

    @staticmethod
    def sum(augend, addend=None):
        if isinstance(augend, list):
            return Addition.sumList(augend)
        return augend + addend

    @staticmethod
    def sumList(valueList):
        result = 0
        for element in valueList:
            result = Addition.sum(result, element)
        return result

03e888a7b2b6e31b85ec53ee77aa679ff0b2a79f
<mask token>

class Addition:
    <mask token>
    <mask token>

class Addition:
    <mask token>

    @staticmethod
    def sumList(valueList):
        result = 0
        for element in valueList:
            result = Addition.sum(result, element)
        return result

class Addition:

    @staticmethod
    def sum(augend, addend=None):
        if isinstance(augend, list):
            return Addition.sumList(augend)
        return augend + addend

    @staticmethod
    def sumList(valueList):
        result = 0
        for element in valueList:
            result = Addition.sum(result, element)
        return result
