[python] 완주하지 못한 선수

문제 출처

완주하지 못한 선수

 

풀이

def solution(participant, completion):
    answer = ''
    dict_participant = {}
    for name in completion:
        if dict_participant.get(name, None):
            dict_participant[name] += 1
        else:
            dict_participant[name] = 1
    for name in participant:
        if dict_participant.get(name, None):
            if dict_participant[name]:
                dict_participant[name] -= 1
            else:
                answer = name
                break
        else:
            answer = name
            break
    return answer