#!/usr/bin/env python
# -*- coding: utf-8 -*-

import csv

inputs = ["part1.txt", "input.txt"]


def solve(filename):
    total = 0
    with open(filename) as tsv:
        for line in csv.reader(tsv, dialect="excel-tab"):
            difference = None
            big = None
            small = None

            for item in line:
                i = int(item)
                if big is None and small is None:
                    big = i
                    small = i

                if i > big:
                    big = i
                if i < small:
                    small = i
            difference = big - small
            total += difference

    return int(total)


for puzzle in inputs:
    print(puzzle, solve(puzzle))