题解 | #计算题目难度#
计算题目难度
https://www.nowcoder.com/practice/76ae981719834b92b877bdc9ac6d38f3
score = list(map(int, (input().split())))
ave = sum(score) / len(score)
full_score_count = score.count(100)
diff_rate = ave / full_score_count
print("{:.1f}".format(diff_rate))
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