func part1[l1: Array, l2: Array] : void
    out := 0
    
    for i in 0..l1->size
        out = out + math.abs(array.nth(l1, i) - array.nth(l2, i))

    io.println_i64(out)

func part2[l1: Array, l2: Array] : void
    out := 0

    for i in 0..l1->size
        out = out + array.nth(l1, i) * alg.count(l2, array.nth(l1, i))

    io.println_i64(out)

func main[] : i64
    lines : Array = must(io.read_text_file?("input.txt")) |> str.split("\n")

    l1 := []
    l2 := []

    for i in 0..lines->size
        line : str = array.nth(lines, i)
        
        parts := str.split(line, "   ")

        array.push(l1, str.parse_i64(array.nth(parts, 0)))
        array.push(l2, str.parse_i64(array.nth(parts, 1)))

    alg.quicksort(l1)
    alg.quicksort(l2)

    part1(l1, l2)
    part2(l1, l2)