package main

import (
	"bufio"
	"fmt"
	"os"
	"slices"
	"strconv"
	"strings"
)

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func main() {
	f, err := os.Open("./one.txt")
	defer f.Close()
	check(err)

	var list [2][]int
	list[0] = make([]int, 0, 10)
	list[1] = make([]int, 0, 10)

	scanner := bufio.NewScanner(f)
	for scanner.Scan() {
		line := scanner.Text()
		fields := strings.Fields(line)

		if len(fields) != 2 {
			fmt.Println(line)
			panic("Need exactly two ints per line")
		}

		for i, field := range fields {
			int_field, err := strconv.Atoi(field)
			check(err)
			list[i] = append(list[i], int_field)
		}
	}

	slices.Sort(list[0])
	slices.Sort(list[1])

	n_vals := len(list[0])

	sum_of_diffs := 0
	for i := 0; i < n_vals; i++ {
		var abs_diff int
		x := list[0][i]
		y := list[1][i]

		if x < y {
			abs_diff = y - x
		} else {
			abs_diff = x - y
		}

		sum_of_diffs += abs_diff
	}

	fmt.Println(sum_of_diffs)

	var numbers [2]map[int]int
	numbers[0] = make(map[int]int)
	numbers[1] = make(map[int]int)

	for i := range list[0] {
		numbers[0][list[0][i]] += 1
		numbers[1][list[1][i]] += 1
	}

	similarity_score := 0
	for number, n := range numbers[0] {
		similarity_score += number * numbers[1][number] * n
	}

	fmt.Println(similarity_score)
}