PROGRAMMERS 12899: 124 나라의 숫자

Link : programmers.co.kr/learn/courses/30/lessons/12899

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Python

def solution(n):
    arr = ['4', '1', '2']
    result = ''
    while n != 0:
        result = arr[n % 3] + result
        n = n // 3 - (n % 3 == 0)
    return result

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