In [1]:
import random, math
total = 0
i = 0
n = int(input('请输入一个整数，按回车键结束'))
m = int(input('请输入一个上界，按回车键结束'))
k = int(input('请输入一个下界，按回车键结束'))
while i <= n:
number = random.randint(m, k)
total = total + number
i += i+1
print(math.sqrt(total / n))