[Level 1] - 완주하지 못한 선수

문제

 

https://programmers.co.kr/learn/courses/30/lessons/42576

코딩테스트 연습 - 완주하지 못한 선수

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나의 풀이

 

def solution(participant, completion):    
    participant = sorted(participant)
    completion = sorted(completion)

    for i, j in zip(participant, completion):
        if i != j:
            return i
        
    return participant[-1]

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다른 사람의 풀이

 

import collections

def solution(participant, completion):
    answer = collections.Counter(participant) - collections.Counter(completion)
    return list(answer.keys())[0]

똑똑한 사람은 참 많다..

 

def solution(participant, completion):
    answer = ''
    temp = 0
    dic = {}
    for part in participant:
        dic[hash(part)] = part
        temp += int(hash(part))
    for com in completion:
        temp -= hash(com)
    answer = dic[temp]

    return answer