Scamming the coding interview : Problem 013 : Find the nth perfect number

perfect_number.py

"""
Scamming the coding interview.

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"""


def find_nth_perfect_number(n):

    sum_of_digits = 0
    for char in str(n):
        sum_of_digits += int(char)

    return (10 * n) + (10 - sum_of_digits)


if __name__ == '__main__':

    assert find_nth_perfect_number(1) == 19
    assert find_nth_perfect_number(2) == 28
    assert find_nth_perfect_number(9) == 91
    assert find_nth_perfect_number(19) == 190