#!/usr/local/cpython-3.4/bin/python

import os
import sys

def main():
    one_megabyte = 1024 * 1024
    count = 0
    while True:
        block = os.read(0, one_megabyte)
        if not block:
            break
        count += len(block)
    sys.stdout.write('{}\n'.format(count))

main()