<reponame>InerstIO/chinese-postman-webpage<gh_stars>0
import csv

def parse(filename):
    with open(filename, 'r') as f:
        reader = csv.reader(f)
        retlist = list(map(list, [map(int, line) for line in reader if line]))
    return retlist

import csv

def parse(filename):
    with open(filename, 'r') as f:
        reader = csv.reader(f)
        retlist = list(map(list, [map(int, line) for line in reader if line]))
    return retlist