문제 링크

정답 :

def solution(arr):
    answer = []
    
    for i in arr:
        if i >= 50 and i % 2 == 0:
            answer.append(i//2)
        elif i < 50 and i % 2:
            answer.append(i*2)
        else:
            answer.append(i)
    
    return answer