day01/day01.go

@@ -1,75 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-)
-
-const digits = "0123456789"
-
-func words() [10]string {
-	return [10]string{"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}
-}
-
-func firstDigit(input string) string {
-	var result string
-	loc := len(input)
-	if index := strings.IndexAny(input, "0123456789"); index != -1 {
-		loc = index
-		result = string([]rune(input)[index])
-	}
-	for key, value := range words() {
-		if index := strings.Index(input, value); index != -1 && index <= loc {
-			loc = index
-			result = strconv.Itoa(key)
-		}
-	}
-	return result
-}
-
-func lastDigit(input string) string {
-	var result string
-	loc := -1
-	if index := strings.LastIndexAny(input, "0123456789"); index != -1 {
-		loc = index
-		result = string([]rune(input)[index])
-	}
-	for key, value := range words() {
-		if index := strings.LastIndex(input, value); index != -1 && index >= loc {
-			loc = index
-			result = strconv.Itoa(key)
-		}
-	}
-	return result
-}
-
-func calibration(input string) int {
-	first := firstDigit(input)
-	last := lastDigit(input)
-	output, _ := strconv.Atoi(first + last)
-	return output
-}
-
-func ScanFile(file *os.File) (int, error) {
-	scanner := bufio.NewScanner(file)
-	sum := 0
-    for scanner.Scan() {
-        sum += calibration(scanner.Text())
-    }
-    if err := scanner.Err(); err != nil {
-        return 0, err
-    }
-	return sum, nil
-}
-
-func main() {
-	sum, err := ScanFile(os.Stdin)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Invalid input: %s\n", err)
-		return
-	}
-	fmt.Println(sum)
-}

day01/day01_test.go

@@ -1,32 +0,0 @@
-package main
-
-import (
-	"os"
-	"testing"
-)
-
-func TestScanFile(t *testing.T) {
-    cases := []struct {
-        inFile string;
-		want int;
-    }{
-        {"input1.txt", 142},
-        {"input2.txt", 281},
-    }
-
-    for _, c := range cases {
-		f, err := os.Open(c.inFile)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		got, err := ScanFile(f)
-		if err != nil {
-			t.Fatal(err)
-		}
-		
-		if got != c.want {
-			t.Errorf("ScanFile(%q) == %d, want %d", c.inFile, got, c.want)
-		}
-	}
-}

day01/input1.txt

@@ -1,4 +0,0 @@
-1abc2
-pqr3stu8vwx
-a1b2c3d4e5f
-treb7uchet

day01/input2.txt

@@ -1,7 +0,0 @@
-two1nine
-eightwothree
-abcone2threexyz
-xtwone3four
-4nineeightseven2
-zoneight234
-7pqrstsixteen

day02/day02.go

@@ -1,82 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-)
-
-type Game struct {
-	id int
-	sets []Set
-}
-
-type Set struct {
-	red int
-	green int
-	blue int
-}
-
-func parseGame(input string) Game {
-	idStr, setsStr, _ := strings.Cut(input, ": ")
-
-	var game Game
-	var err error
-
-	game.id, err = strconv.Atoi(strings.TrimPrefix(idStr, "Game "))
-
-	for i, setStr := range strings.Split(setsStr, "; ") {
-		game.sets = append(game.sets, Set{})
-		for _, colorStr := range strings.Split(setStr, ", ") {
-			if strings.HasSuffix(colorStr, " red") {
-				game.sets[i].red, err = strconv.Atoi(strings.TrimSuffix(colorStr, " red"))
-			}
-			if strings.HasSuffix(colorStr, " green") {
-				game.sets[i].green, err = strconv.Atoi(strings.TrimSuffix(colorStr, " green"))
-			}
-			if strings.HasSuffix(colorStr, " blue") {
-				game.sets[i].blue, err = strconv.Atoi(strings.TrimSuffix(colorStr, " blue"))
-			}
-		}
-	}
-
-    if err != nil {
-        panic("day02: invalid game format")
-    }
-
-	return game
-}
-
-func isGameValid(game Game) bool {
-	for _, set := range game.sets {
-		if set.red > 12 || set.green > 13 || set.blue > 14 {
-			return false
-		}
-	}
-	return true
-}
-
-func ScanFile(file *os.File) (int, error) {
-	scanner := bufio.NewScanner(file)
-	sum := 0
-    for scanner.Scan() {
-		if game := parseGame(scanner.Text()); isGameValid(game) {
-			sum += game.id
-		}
-    }
-    if err := scanner.Err(); err != nil {
-        return 0, err
-    }
-	return sum, nil
-}
-
-func main() {
-	sum, err := ScanFile(os.Stdin)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Invalid input: %s\n", err)
-		return
-	}
-	fmt.Println(sum)
-}

day02/day02_test.go

@@ -1,31 +0,0 @@
-package main
-
-import (
-	"os"
-	"testing"
-)
-
-func TestScanFile(t *testing.T) {
-    cases := []struct {
-        inFile string;
-		want int;
-    }{
-        {"input1.txt", 8},
-    }
-
-    for _, c := range cases {
-		f, err := os.Open(c.inFile)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		got, err := ScanFile(f)
-		if err != nil {
-			t.Fatal(err)
-		}
-		
-		if got != c.want {
-			t.Errorf("ScanFile(%q) == %d, want %d", c.inFile, got, c.want)
-		}
-	}
-}

day02/input1.txt

@@ -1,5 +0,0 @@
-Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
-Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
-Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
-Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
-Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green

go.mod

@@ -1,3 +0,0 @@
-module git.qenya.tel/qenya/aoc2023
-
-go 1.23.2

shell.nix

@@ -1,10 +0,0 @@
-let
-  pkgs = import <nixpkgs> {};
-in pkgs.mkShell {
-  packages = with pkgs; [
-    go
-  ];
-  shellHook = ''
-    export PATH=$PATH:~/go/bin
-  '';
-}