[프로그래머스][python]12943. 콜라츠 추측

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

코딩테스트 연습 - 콜라츠 추측

My answer:

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