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implement using custom sort function on an update struct

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rerun benchmarks
This commit is contained in:
onyx-and-iris 2024-12-09 01:05:54 +00:00
parent 965e704d39
commit 6b7f79b6f0
7 changed files with 85 additions and 111 deletions
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22
day-05/benchmark
View File

@ -2,14 +2,14 @@ goos: linux
goarch: amd64
pkg: github.com/onyx-and-iris/aoc2024/day-05
cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
BenchmarkSolve-12 1000000000 0.02016 ns/op
BenchmarkSolve-12 1000000000 0.02019 ns/op
BenchmarkSolve-12 1000000000 0.02182 ns/op
BenchmarkSolve-12 1000000000 0.01990 ns/op
BenchmarkSolve-12 1000000000 0.02056 ns/op
BenchmarkSolve-12 1000000000 0.02031 ns/op
BenchmarkSolve-12 1000000000 0.02083 ns/op
BenchmarkSolve-12 1000000000 0.02167 ns/op
BenchmarkSolve-12 1000000000 0.02048 ns/op
BenchmarkSolve-12 1000000000 0.02080 ns/op
ok github.com/onyx-and-iris/aoc2024/day-05 1.471s
BenchmarkSolve-12 1000000000 0.0008615 ns/op
BenchmarkSolve-12 1000000000 0.0008750 ns/op
BenchmarkSolve-12 1000000000 0.0008650 ns/op
BenchmarkSolve-12 1000000000 0.0009446 ns/op
BenchmarkSolve-12 1000000000 0.0009151 ns/op
BenchmarkSolve-12 1000000000 0.0008940 ns/op
BenchmarkSolve-12 1000000000 0.0008744 ns/op
BenchmarkSolve-12 1000000000 0.0008429 ns/op
BenchmarkSolve-12 1000000000 0.0008286 ns/op
BenchmarkSolve-12 1000000000 0.0008589 ns/op
ok github.com/onyx-and-iris/aoc2024/day-05 0.085s

4
day-05/internal/one/benchmark
View File

@ -2,5 +2,5 @@ goos: linux
goarch: amd64
pkg: github.com/onyx-and-iris/aoc2024/day-05/internal/one
cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
BenchmarkSolve-12 1000000000 0.007571 ns/op
ok github.com/onyx-and-iris/aoc2024/day-05/internal/one 0.052s
BenchmarkSolve-12 1000000000 0.0004326 ns/op
ok github.com/onyx-and-iris/aoc2024/day-05/internal/one 0.008s

26
day-05/internal/one/solve.go
View File

@ -9,33 +9,19 @@ import (
func Solve(buf []byte) (int, error) {
r := bytes.NewReader(buf)
data, err := util.ParseLines(r)
updates, orderings, err := util.ParseLines(r)
if err != nil {
return 0, err
}
var sum int
for i, products := range data[1] {
inOrder := true
for _, product := range products {
for _, rules := range data[0] {
if !slices.Contains(rules, product) {
continue
}
for _, update := range updates {
beforeSort := slices.Clone(update.Pages)
update.Sort(orderings)
indx1, indx2 := slices.Index(products, rules[0]), slices.Index(products, rules[1])
if indx1 != -1 && indx2 != -1 && indx2 < indx1 {
inOrder = false
break
}
}
if !inOrder {
break
}
}
if inOrder {
sum += data[1][i][len(data[1][i])/2]
if slices.Compare(beforeSort, update.Pages) == 0 {
sum += update.Pages[len(update.Pages)/2]
}
}

4
day-05/internal/two/benchmark
View File

@ -2,5 +2,5 @@ goos: linux
goarch: amd64
pkg: github.com/onyx-and-iris/aoc2024/day-05/internal/two
cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
BenchmarkSolve-12 1000000000 0.01270 ns/op
ok github.com/onyx-and-iris/aoc2024/day-05/internal/two 0.083s
BenchmarkSolve-12 1000000000 0.0004492 ns/op
ok github.com/onyx-and-iris/aoc2024/day-05/internal/two 0.008s

48
day-05/internal/two/solve.go
View File

@ -4,62 +4,26 @@ import (
"bytes"
"slices"
log "github.com/sirupsen/logrus"
"github.com/onyx-and-iris/aoc2024/day-05/internal/util"
)
func Solve(buf []byte) (int, error) {
r := bytes.NewReader(buf)
data, err := util.ParseLines(r)
updates, orderings, err := util.ParseLines(r)
if err != nil {
return 0, err
}
var sum int
for i, products := range data[1] {
inOrder := true
for _, product := range products {
for _, rulesets := range data[0] {
if !slices.Contains(rulesets, product) {
continue
}
for _, update := range updates {
beforeSort := slices.Clone(update.Pages)
update.Sort(orderings)
indx1, indx2 := slices.Index(products, rulesets[0]), slices.Index(products, rulesets[1])
if indx1 != -1 && indx2 != -1 && indx2 < indx1 {
inOrder = false
break
}
}
if !inOrder {
break
}
}
if !inOrder {
sum += midOfFixedOrder(data[1][i], data[0])
if slices.Compare(beforeSort, update.Pages) != 0 {
sum += update.Pages[len(update.Pages)/2]
}
}
return sum, nil
}
func midOfFixedOrder(products []int, rulesets [][]int) int {
log.Debugf("unordered products: %v", products)
for {
var sorts int
for _, ruleset := range rulesets {
indx1, indx2 := slices.Index(products, ruleset[0]), slices.Index(products, ruleset[1])
if indx1 != -1 && indx2 != -1 && indx2 < indx1 {
products[indx1], products[indx2] = products[indx2], products[indx1]
sorts++
}
}
if sorts == 0 {
break
}
}
return products[len(products)/2]
}

20
day-05/internal/update/update.go Normal file
View File

@ -0,0 +1,20 @@
package update
import "slices"
type Update struct {
Pages []int
}
func (u Update) Sort(orderings map[int][]int) {
slices.SortFunc(u.Pages, func(p, q int) int {
v, ok := orderings[p]
if ok {
if slices.Contains(v, q) {
return -1
}
return 1
}
return 1
})
}

72
day-05/internal/util/util.go
View File

@ -3,47 +3,51 @@ package util
import (
"bufio"
"io"
"log"
"strconv"
"strings"
"github.com/onyx-and-iris/aoc2024/day-05/internal/update"
)
func MustConv(s string) int {
func ParseLines(r io.Reader) ([]update.Update, map[int][]int, error) {
var updates []update.Update
orderings := make(map[int][]int, 0)
var inUpdates bool
scanner := bufio.NewScanner(r)
for scanner.Scan() {
line := scanner.Text()
if len(line) == 0 {
inUpdates = true
continue
}
if inUpdates {
var update update.Update
for _, n := range strings.Split(line, ",") {
update.Pages = append(update.Pages, mustConv(n))
}
updates = append(updates, update)
} else {
left, right := func() (int, int) {
x := strings.Split(line, "|")
return mustConv(x[0]), mustConv(x[1])
}()
orderings[left] = append(orderings[left], right)
}
}
if err := scanner.Err(); err != nil {
return nil, nil, err
}
return updates, orderings, nil
}
func mustConv(s string) int {
n, err := strconv.Atoi(s)
if err != nil {
panic(err)
}
return n
}
func ParseLines(r io.Reader) ([][][]int, error) {
data := make([][][]int, 2)
filter := func(r rune) bool {
return r == '|' || r == ','
}
buf, err := io.ReadAll(r)
if err != nil {
log.Fatal(err)
}
parts := strings.Split(string(buf), "\n\n")
for i, part := range parts {
scanner := bufio.NewScanner(strings.NewReader(part))
for scanner.Scan() {
filtered := strings.FieldsFunc(scanner.Text(), filter)
var nums []int
for _, n := range filtered {
nums = append(nums, MustConv(n))
}
data[i] = append(data[i], nums)
}
if err := scanner.Err(); err != nil {
return nil, err
}
}
return data, nil
}