sum = 0
i = 0
begin
    while true
	line = readline
	if line =~ /end/
	    break
	end
	sum = sum + line.to_i
	i = i + 1
    end 
rescue => e
    STDERR.puts(e)
end
printf("total = %d, number = %d, average = %f\n", sum, i, sum.to_f / i)