l1-068 调和平均 python

L1-068 调和平均是一个计算给定一系列正数的调和平均值的问题。调和平均值是指这些数的倒数的算数平均的倒数。在Python中，可以使用以下代码计算调和平均值：

a = int(input())
b = [eval(i) for i in input().split()]
sum = 0
for i in b:
sum += 1/i
print("%.2f" % (1/(sum/a)))

或者使用以下代码：

n = int(input())
print('%.2f' % (1/(sum([1/float(i) for i in input().split()])/n)))

这两段代码都可以计算给定一系列正数的调和平均值，并将结果保留两位小数进行输出。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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