61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
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package main
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import (
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"fmt"
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"slices"
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"strconv"
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"strings"
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"git.mstar.dev/mstar/aoc24/util"
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"git.mstar.dev/mstar/goutils/sliceutils"
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)
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func LineExtract(line string) (int, int) {
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tmp := sliceutils.Filter(strings.Split(line, " "), func(s string) bool {
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return len(s) > 0
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})
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if len(tmp) != 2 {
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return 1, 1
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}
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left, err := strconv.Atoi(tmp[0])
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if err != nil {
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panic(err)
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}
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right, err := strconv.Atoi(tmp[1])
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if err != nil {
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panic(err)
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}
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return left, right
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}
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func main() {
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data := util.LoadFileFromArgs()
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lines := sliceutils.Filter(
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strings.Split(string(data), "\n"),
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func(t string) bool { return len(t) > 0 },
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)
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numbersLeft := []int{}
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numberRight := []int{}
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for _, line := range lines {
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l, r := LineExtract(line)
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numbersLeft = append(numbersLeft, l)
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numberRight = append(numberRight, r)
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}
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slices.Sort(numberRight)
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slices.Sort(numbersLeft)
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diffs := make([]int, len(lines))
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for i := range len(lines) {
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diffs = append(diffs, util.AbsI(numbersLeft[i]-numberRight[i]))
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}
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total := sliceutils.Compact(diffs, func(acc, next int) int { return acc + next })
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fmt.Printf("Task 1: %d\n", total)
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acc := 0
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for _, v := range numbersLeft {
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acc += len(sliceutils.Filter(numberRight, func(t int) bool { return t == v })) * v
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}
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fmt.Printf("Task 2: %d\n", acc)
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}
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