[python] 프로그래머스 실패율

https://programmers.co.kr/learn/courses/30/lessons/42889

코딩테스트 연습 - 실패율

 

- python

def solution(N, stages):
    answer = []
    stages.sort()
    failure = {x:0 for x in range(1, N+1)}
        
    cnt = len(stages)    
    for i in range(1, N+1) :
        tmp = stages.count(i)
        if tmp == 0 : failure[i] = 0
        else :
            failure[i] = tmp / cnt
            cnt -= tmp
        
    # -x[1] 내림차순 , x[1] 오름차순
    failure = sorted(failure.items(), key = lambda x : -x[1]) 
    answer = [x[0] for x in failure]
    return answer