import numpy

mx = 0.0
my = 0.0
n = 0
file = open("data.txt", "r")

for line in file:
	columns = line.split()
	x = float(columns[0])
	y = float(columns[1])
	print("přečteno: " + columns[0] + "\t" + columns[1])
	mx = mx + x
	my = my + y
	n  = n + 1

file.close()
mx = mx / n
my = my / n
print("----------------------------------------")
print("průměrné x = " + str(mx) + ", průměrné y = " + str(my))