Introduction to Sets

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    def average(array): values_of_array = set(array) length_of_array = len(values_of_array) averages_of_array = sum(values_of_array)

    return averages_of_array / length_of_array
    

    if name == 'main': n = int(input()) arr = list(map(int, input().split())) result = average(arr) print(result)