[프로그래머스] 실패율

 

코딩테스트 연습 - 실패율

내 풀이 (런타임 에러 몇개 발생 10문제 중에 7문제 맞음)

from collections import Counter
def solution(N, stages):    
    stages_count = Counter(stages)
    people = len(stages)
    answer = []
    fail_list = {}
    
    for i in range(1, N+1):
        
        fail_list[i] = stages_count[i] / people
        people = people - stages_count[i]

    fail_list = sorted(fail_list.items(), key = lambda item: item[1], reverse = True)
    
    for key in fail_list:
        answer.append(key[0])
    return answer

 

내풀이 (두번째 도전)

from collections import Counter
def solution(N, stages):    
    stages_count = Counter(stages)
    people = len(stages)
    answer = []
    fail_list = {}
    
    for i in range(1, N+1):
        if people != 0:
            fail_list[i] = stages_count[i] / people
            people = people - stages_count[i]
        else:
            fail_list[i] = 0

    fail_list = sorted(fail_list.items(), key = lambda item: item[1], reverse = True)
    
    for key in fail_list:
        answer.append(key[0])
    return answer

 

다른 방법

def solution(N, stages):
    People = len(stages)
    faillist = {}
    for i in range(1, N + 1):
        if People != 0:
            faillist[i] = stages.count(i) / People
            People -= stages.count(i)
        else:
            faillist[i] = 0

    return sorted(faillist, key=lambda i: faillist[i], reverse=True)