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[Blzae97]

시간 제한: 2초 난이도: 브론즈Ⅰ 백준 온라인 저지: 1546번 https://www.acmicpc.net/problem/1546

[teang1995]

# https://www.acmicpc.net/problem/1546

N = int(input())
scores = input()
score_list = scores.split(" ")

score_list = [int(x) for x in score_list]
max_score = max(score_list)
fixed_score_list = [x * 100 / max_score for x in score_list]

print(sum(fixed_score_list) / len(fixed_score_list))