문제

https://programmers.co.kr/learn/courses/30/lessons/12943

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접근

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코드

📌 python

def solution(num):
    i=0
    while(num != 1.0) :
        if i >=500 : 
            return -1
            break
        if num%2==0 :
            num = num//2
            i += 1
        elif num%2==1 :
            num = 3*num + 1
            i += 1
            
    return i