[프로그래머스/PYTHON] 햄버거 만들기

https://school.programmers.co.kr/learn/courses/30/lessons/133502

프로그래머스

 

def solution(ing):
    answer=0
    total_3=ing[2:-1].count(3)
    num=2

    for i in range(total_3):
        num=ing.index(3,num)
        if ing[num-2:num+2]==[1,2,3,1]:
            del ing[num-2:num+2]
            answer+=1
            num-=2
        else:
            num+=1
        
        
    return answer