[알고리즘]기초1-같은 숫자는 싫어

같은 숫자는 싫어

https://programmers.co.kr/learn/courses/30/lessons/12906

def solution(arr):
    answer = []
    for i in arr:
        if i not in answer:
            answer.append(i)
        elif answer[-1]!=i:
            answer.append(i)
    return answer