sum

#!/usr/bin/env python

print("type integers, each followed by Enter; or ^D or ^Z to finish")
total = 0
count = 0
while True:
        try:
                line = input()
                if line:
                        number = int(line)
                        total += number
                        count += 1
        except ValueError as err:
                print(err)
                continue
        except EOFError:
                break
if count:
	print("count = %i" % count, "total = %i" % total, "mean = %f" % (total/count))