[프로그래머스][Lv1] - 콜라츠 추측 (Python)

def solution(n):
    answer = 0
    
    while n >1:

            
        if n % 2 == 0:
            n = n//2 
            answer += 1 
        else:
            n = (n*3)+1
            answer += 1 
    if answer > 500:
        return -1
    else:
        return answer