[프로그래머스] 같은 숫자는 싫어 python

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

def solution(arr):
    answer = []
    for i in range(0, len(arr)):
        for j in range(1,len(arr)-i):
            if arr[i] != arr[i+j]:
                answer.append(arr[i])
            else: 
                break
            break
    answer.append(arr[len(arr)-1])
    return answer