[Level 1][복습] - 3진법 뒤집기

문제

 

https://programmers.co.kr/learn/courses/30/lessons/68935

코딩테스트 연습 - 3진법 뒤집기

 

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나의 풀이

 

def solution(n):
    answer=0

    s=[]

    while n != 0:
        s.append(n % 3)
        n //= 3
    
    for i in range(1,len(s)+1):
        answer += s[-i] * 3 ** (i-1)
        
    return answer

 

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다른 사람의 풀이

 

def solution(n):
    tmp = ''
    while n:
        tmp += str(n % 3)
        n = n // 3

    answer = int(tmp, 3)
    return answer

 

def solution(n):
    answer = 0
    cnt = 1
    a = ''
    while n>0:
        a+=str(n%3)
        n = n//3
    print(a)
    for b in range(len(a),0,-1):
        answer += (int(a[b-1])*cnt)
        cnt *= 3
    return answer