add day-19 + benchmarks

day-19/benchmark

@@ -0,0 +1,15 @@
+goos: linux
+goarch: amd64
+pkg: github.com/onyx-and-iris/aoc2024/day-19
+cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
+BenchmarkSolve-12    	1000000000	         0.1996 ns/op
+BenchmarkSolve-12    	1000000000	         0.2115 ns/op
+BenchmarkSolve-12    	1000000000	         0.1903 ns/op
+BenchmarkSolve-12    	1000000000	         0.1840 ns/op
+BenchmarkSolve-12    	1000000000	         0.1891 ns/op
+BenchmarkSolve-12    	1000000000	         0.1828 ns/op
+BenchmarkSolve-12    	1000000000	         0.1888 ns/op
+BenchmarkSolve-12    	1000000000	         0.1834 ns/op
+BenchmarkSolve-12    	1000000000	         0.1895 ns/op
+BenchmarkSolve-12    	1000000000	         0.1832 ns/op
+ok  	github.com/onyx-and-iris/aoc2024/day-19	24.811s

day-19/cmd/cli/main.go

@@ -0,0 +1,41 @@
+/********************************************************************************
+    Advent of Code 2024 - day-19
+********************************************************************************/
+
+package main
+
+import (
+	"embed"
+	"flag"
+	"fmt"
+	"slices"
+
+	log "github.com/sirupsen/logrus"
+
+	problems "github.com/onyx-and-iris/aoc2024/day-19"
+)
+
+//go:embed testdata
+var files embed.FS
+
+func main() {
+	filename := flag.String("f", "input.txt", "input file")
+	loglevel := flag.Int("l", int(log.InfoLevel), "log level")
+	flag.Parse()
+
+	if slices.Contains(log.AllLevels, log.Level(*loglevel)) {
+		log.SetLevel(log.Level(*loglevel))
+	}
+
+	data, err := files.ReadFile(fmt.Sprintf("testdata/%s", *filename))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	one, two, err := problems.Solve(data)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("solution one: %d\nsolution two: %d\n", one, two)
+}

day-19/go.mod

@@ -0,0 +1,7 @@
+module github.com/onyx-and-iris/aoc2024/day-19
+
+go 1.23.3
+
+require github.com/sirupsen/logrus v1.9.3
+
+require golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect

day-19/go.sum

@@ -0,0 +1,15 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

day-19/internal/one/benchmark

@@ -0,0 +1,6 @@
+goos: linux
+goarch: amd64
+pkg: github.com/onyx-and-iris/aoc2024/day-19/internal/one
+cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
+BenchmarkSolve-12    	1000000000	         0.1706 ns/op
+ok  	github.com/onyx-and-iris/aoc2024/day-19/internal/one	2.018s

day-19/internal/one/solve.go

@@ -0,0 +1,58 @@
+package one
+
+import (
+	"bytes"
+	"cmp"
+	"slices"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func Solve(buf []byte) (int, error) {
+	r := bytes.NewReader(buf)
+	stripes, designs, err := parseLines(r)
+	if err != nil {
+		return 0, err
+	}
+
+	log.Debug(stripes, designs)
+
+	var sum int
+	for _, design := range designs {
+		ok := isPossibleArrangement(design, stripes)
+		if ok {
+			log.Debugf("design: %s is possible", design)
+			sum++
+		}
+	}
+
+	return sum, nil
+}
+
+func isPossibleArrangement(design string, stripes []string) bool {
+	if len(design) == 0 {
+		return true
+	}
+
+	greedy := []string{}
+	for _, stripe := range stripes {
+		log.Debugf("testing design: %s with stripe: %s", design, stripe)
+		if strings.HasPrefix(design, stripe) {
+			log.Debugf("design: %s has prefix %s", design, stripe)
+
+			greedy = append(greedy, stripe)
+		}
+	}
+
+	slices.SortFunc(greedy, func(a, b string) int {
+		return cmp.Compare(len(b), len(a))
+	})
+
+	for _, g := range greedy {
+		if isPossibleArrangement(design[len(g):], stripes) {
+			return true
+		}
+	}
+	return false
+}

day-19/internal/one/solve_internal_test.go

@@ -0,0 +1,15 @@
+package one
+
+import (
+	_ "embed"
+	"os"
+	"testing"
+)
+
+//go:embed testdata/input.txt
+var data []byte
+
+func BenchmarkSolve(b *testing.B) {
+	os.Stdout, _ = os.Open(os.DevNull)
+	Solve(data)
+}

day-19/internal/one/util.go

@@ -0,0 +1,33 @@
+package one
+
+import (
+	"bufio"
+	"io"
+	"strings"
+)
+
+func parseLines(r io.Reader) ([]string, []string, error) {
+	var stripes, designs []string
+
+	var inDesigns bool
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" {
+			inDesigns = true
+			continue
+		}
+
+		if inDesigns {
+			designs = append(designs, line)
+		} else {
+			stripes = strings.Split(line, ", ")
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, nil, err
+	}
+
+	return stripes, designs, nil
+}

day-19/internal/two/benchmark

@@ -0,0 +1,6 @@
+goos: linux
+goarch: amd64
+pkg: github.com/onyx-and-iris/aoc2024/day-19/internal/two
+cpu: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
+BenchmarkSolve-12    	1000000000	         0.01208 ns/op
+ok  	github.com/onyx-and-iris/aoc2024/day-19/internal/two	0.091s

day-19/internal/two/solve.go

@@ -0,0 +1,72 @@
+package two
+
+import (
+	"bytes"
+	"cmp"
+	"slices"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func Solve(buf []byte) (int, error) {
+	r := bytes.NewReader(buf)
+	stripes, designs, err := parseLines(r)
+	if err != nil {
+		return 0, err
+	}
+
+	conc := len(designs)
+	countChan := make(chan int)
+	for _, design := range designs {
+		go func() {
+			count, ok := numPossibleArrangement(design, stripes, make(map[string]int))
+			if ok {
+				log.Debugf("design: %s is possible in %d ways", design, count)
+				countChan <- count
+				return
+			}
+			countChan <- 0
+		}()
+	}
+
+	var totalCount int
+	for range conc {
+		count := <-countChan
+		totalCount += count
+	}
+
+	return totalCount, nil
+}
+
+func numPossibleArrangement(design string, stripes []string, memo map[string]int) (int, bool) {
+	if len(design) == 0 {
+		return 1, true
+	}
+
+	greedy := []string{}
+	for _, stripe := range stripes {
+		if strings.HasPrefix(design, stripe) {
+			greedy = append(greedy, stripe)
+		}
+	}
+
+	slices.SortFunc(greedy, func(a, b string) int {
+		return cmp.Compare(len(b), len(a))
+	})
+
+	var totalCount int
+	for _, g := range greedy {
+		if count, ok := memo[design[len(g):]]; ok {
+			totalCount += count
+			continue
+		}
+
+		count, ok := numPossibleArrangement(design[len(g):], stripes, memo)
+		if ok {
+			totalCount += count
+		}
+		memo[design[len(g):]] = count
+	}
+	return totalCount, true
+}

day-19/internal/two/solve_internal_test.go

@@ -0,0 +1,15 @@
+package two
+
+import (
+	_ "embed"
+	"os"
+	"testing"
+)
+
+//go:embed testdata/input.txt
+var data []byte
+
+func BenchmarkSolve(b *testing.B) {
+	os.Stdout, _ = os.Open(os.DevNull)
+	Solve(data)
+}

day-19/internal/two/util.go

@@ -0,0 +1,33 @@
+package two
+
+import (
+	"bufio"
+	"io"
+	"strings"
+)
+
+func parseLines(r io.Reader) ([]string, []string, error) {
+	var stripes, designs []string
+
+	var inDesigns bool
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" {
+			inDesigns = true
+			continue
+		}
+
+		if inDesigns {
+			designs = append(designs, line)
+		} else {
+			stripes = strings.Split(line, ", ")
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, nil, err
+	}
+
+	return stripes, designs, nil
+}

day-19/makefile

@@ -0,0 +1,30 @@
+program = day-19
+
+GO = go
+SRC_DIR := src
+BIN_DIR := bin
+
+EXE := $(BIN_DIR)/$(program)
+
+.DEFAULT_GOAL := build
+
+.PHONY: fmt vet build bench clean
+fmt:        
+	$(GO) fmt ./...
+
+vet: fmt        
+	$(GO) vet ./...
+
+build: vet | $(BIN_DIR)
+	$(GO) build -o $(EXE) ./$(SRC_DIR)
+
+bench:
+	$(GO) test ./internal/one/ -bench=. > internal/one/benchmark
+	$(GO) test ./internal/two/ -bench=. > internal/two/benchmark
+	$(GO) test . -count=10 -bench=. > benchmark
+
+$(BIN_DIR):
+	@mkdir -p $@
+
+clean:
+	@rm -rv $(BIN_DIR)

day-19/solve.go

@@ -0,0 +1,20 @@
+package dayeighteen
+
+import (
+	"github.com/onyx-and-iris/aoc2024/day-19/internal/one"
+	"github.com/onyx-and-iris/aoc2024/day-19/internal/two"
+)
+
+func Solve(buf []byte) (int, int, error) {
+	answerOne, err := one.Solve(buf)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	answerTwo, err := two.Solve(buf)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	return answerOne, answerTwo, nil
+}

day-19/solve_internal_test.go

@@ -0,0 +1,15 @@
+package dayeighteen
+
+import (
+	_ "embed"
+	"os"
+	"testing"
+)
+
+//go:embed testdata/input.txt
+var data []byte
+
+func BenchmarkSolve(b *testing.B) {
+	os.Stdout, _ = os.Open(os.DevNull)
+	Solve(data)
+}