312. 상호 평가

프로그래머스

1. Python

def solution(scores):
    answer = ''
    n = len(scores)
    average = []

    for j in range(n):
        max_idx = 0
        min_idx = 0
        max_keep = []
        min_keep = []
        total = 0
        for i in range(n):
            if scores[i][j] > scores[max_idx][j]:
                max_idx = i
                max_keep = []
            elif scores[i][j] == scores[max_idx][j]:
                max_idx = i
                max_keep.append(max_idx)
                max_keep.append(i)
                
            if scores[i][j] < scores[min_idx][j]:
                min_idx = i
                min_keep = []
            elif scores[i][j] == scores[min_idx][j]:
                min_idx = i
                min_keep.append(min_idx)
                min_keep.append(i)
                
            total += scores[i][j]
        
        if max_idx == j and len(max_keep) < 2 or min_idx == j and len(min_keep) < 2:
            average.append((total - scores[j][j]) / (n - 1))
        else:
            average.append(total / n)
            
    for a in average:
        if 90 <= a:
            answer += 'A'
        elif 80 <= a:
            answer += 'B'
        elif 70 <= a:
            answer += 'C'
        elif 50 <= a:
            answer += 'D'
        else:
            answer += 'F'
    print(average)
                
    return answer

count 사용

def solution(scores) :

    avgs=[]

    score=[ [i[j] for i in scores] for j in range(len(scores))]

    for idx,i in enumerate(score) :

        avg=sum(i) ; length=len(i)

        if i[idx] == max(i) or i[idx] == min(i) :

            if i.count(i[idx]) == 1 :

                avg-=i[idx] ; length-=1

        avgs.append(avg/length)

    return "".join([ avg>=90 and "A" or avg>=80 and "B" or avg>=70 and "C" or avg>=50 and "D" or "F" for avg in avgs ])