[Level 1] / [Python] 같은 숫자는 싫어

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

프로그래머스

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