#!/usr/bin/env python

import sys

total = []

for price in sys.stdin:
	total.append(int(price))

else:
	count = len(total)
	mean = sum(total) / count
	var = [(x - mean)**2 for x in total]
	var = sum(var) / count
	print(count, mean, var)
50a136ef6f328785e68fbfa7c7f0905fe0532aa9
<mask token>

<mask token>
for price in sys.stdin:
    total.append(int(price))
else:
    count = len(total)
    mean = sum(total) / count
    var = [((x - mean) ** 2) for x in total]
    var = sum(var) / count
    print(count, mean, var)

<mask token>
total = []
for price in sys.stdin:
    total.append(int(price))
else:
    count = len(total)
    mean = sum(total) / count
    var = [((x - mean) ** 2) for x in total]
    var = sum(var) / count
    print(count, mean, var)

import sys
total = []
for price in sys.stdin:
    total.append(int(price))
else:
    count = len(total)
    mean = sum(total) / count
    var = [((x - mean) ** 2) for x in total]
    var = sum(var) / count
    print(count, mean, var)

#!/usr/bin/env python

import sys

total = []

for price in sys.stdin:
	total.append(int(price))

else:
	count = len(total)
	mean = sum(total) / count
	var = [(x - mean)**2 for x in total]
	var = sum(var) / count
	print(count, mean, var)