2023/01

2023/.gitignore

@@ -0,0 +1 @@
+input.txt

2023/01/go.mod

@@ -0,0 +1,11 @@
+module zv0n/advent_of_code/2023/01
+
+go 1.21.4
+
+require (
+	github.com/fatih/color v1.16.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/thoas/go-funk v0.9.3 // indirect
+	golang.org/x/sys v0.14.0 // indirect
+)

2023/01/go.sum

@@ -0,0 +1,19 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
+github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/thoas/go-funk v0.9.3 h1:7+nAEx3kn5ZJcnDm2Bh23N2yOtweO14bi//dvRtgLpw=
+github.com/thoas/go-funk v0.9.3/go.mod h1:+IWnUfUmFO1+WVYQWQtIJHeRRdaIyyYglZN7xzUPe4Q=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
+golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

2023/01/main.go

@@ -0,0 +1,122 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+	"unicode"
+
+	"github.com/fatih/color"
+	"github.com/thoas/go-funk"
+)
+
+var numberstrings = [9]string{"one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}
+
+func readFileLines(filename string) ([]string, error) {
+	var lines []string
+
+	file, err := os.Open(filename)
+	if err != nil {
+		return lines, err
+	}
+	fileScanner := bufio.NewScanner(file)
+	fileScanner.Split(bufio.ScanLines)
+
+	for fileScanner.Scan() {
+		lines = append(lines, fileScanner.Text())
+	}
+
+	return lines, nil
+}
+
+func getNumbersFromLines(lines []string) []int {
+	var result []int
+	for _, line := range lines {
+		firstnum := -1
+		lastnum := -1
+		for _, char := range line {
+			if unicode.IsDigit(rune(char)) {
+				if firstnum == -1 {
+					firstnum = int(char) - int('0')
+				} else {
+					lastnum = int(char) - int('0')
+				}
+			}
+		}
+		if lastnum == -1 {
+			lastnum = firstnum
+		}
+		result = append(result, firstnum*10+lastnum)
+	}
+	return result
+}
+
+func getNumbersFromLinesPart2(lines []string) []int {
+	var result []int
+	for _, line := range lines {
+		firstnum := -1
+		lastnum := -1
+		firstnumIndex := len(line)
+		lastnumIndex := 0
+		for idx, char := range line {
+			if unicode.IsDigit(rune(char)) {
+				if firstnum == -1 {
+					firstnum = int(char) - int('0')
+					firstnumIndex = idx
+				} else {
+					lastnum = int(char) - int('0')
+					lastnumIndex = idx
+				}
+			}
+		}
+		if lastnum == -1 {
+			lastnum = firstnum
+			lastnumIndex = firstnumIndex
+		}
+		for idx, num := range numberstrings {
+			stridx := strings.Index(line, num)
+			if stridx != -1 && stridx < firstnumIndex {
+				firstnum = idx + 1
+				firstnumIndex = stridx
+			}
+			stridx = strings.LastIndex(line, num)
+			if stridx > lastnumIndex {
+				lastnum = idx + 1
+				lastnumIndex = stridx
+			}
+		}
+		if lastnum == -1 {
+			lastnum = firstnum
+		}
+		result = append(result, firstnum*10+lastnum)
+	}
+	return result
+}
+
+func main() {
+	redPrint := color.New(color.FgRed)
+	yellowPrint := color.New(color.FgYellow)
+	if len(os.Args) < 2 {
+		redPrint.Fprintln(os.Stderr, "You must provide the input file")
+		os.Exit(1)
+	}
+	lines, err := readFileLines(os.Args[1])
+	if err != nil {
+		redPrint.Fprintln(os.Stderr, "Could not read input file")
+		os.Exit(1)
+	}
+	numbers := getNumbersFromLines(lines)
+	sum := funk.Reduce(numbers, '+', 0)
+
+	fmt.Print("Part 1: ")
+	yellowPrint.Print(sum)
+	fmt.Println()
+
+	numbers2 := getNumbersFromLinesPart2(lines)
+	sum2 := funk.Reduce(numbers2, '+', 0)
+
+	fmt.Print("Part 2: ")
+	yellowPrint.Print(sum2)
+	fmt.Println()
+}