p1

2024/02/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.23.3

2024/02/main.go

@@ -0,0 +1,115 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+const (
+	Increasing = 1
+	Decreasing = -1
+)
+
+func absInt(x int) int {
+	return absDiffInt(x, 0)
+}
+
+func absDiffInt(x, y int) int {
+	if x < y {
+		return y - x
+	}
+	return x - y
+}
+
+func checkDirection(x int) int {
+	switch {
+	case x < 0:
+		return Increasing
+	case x > 0:
+		return Decreasing
+	default:
+		return 0
+	}
+}
+
+func checklevel(report []int) bool {
+	dir := checkDirection(report[0] - report[1])
+	for i := 0; i < len(report)-1; i++ {
+		zero := report[i]
+		one := report[i+1]
+		diff := zero - one
+		if newDir := checkDirection(diff); newDir != dir {
+			return false
+		}
+		absDiff := absInt(diff)
+		if absDiff < 1 || absDiff > 3 {
+			return false
+		}
+	}
+	return true
+}
+
+func main() {
+
+	lines, err := parse()
+	if err != nil {
+		fmt.Println("Error:", err)
+	}
+
+	var safes = 0
+	var safes2 = 0
+
+	for _, line := range lines {
+		numbers := strings.Fields(line)
+		report := make([]int, len(numbers))
+		for i, num := range numbers {
+			x, err := strconv.Atoi(num)
+			if err != nil {
+				panic(err)
+			}
+			report[i] = x
+		}
+		if checklevel(report) {
+			safes++
+			safes2++
+		} else {
+			var checks = 0
+			for j := 0; j < len(report); j++ {
+				copyArray := make([]int, len(report))
+				copy(copyArray, report)
+				report2 := append(copyArray[:j], copyArray[j+1:]...)
+				if checklevel(report2) {
+					checks++
+				}
+			}
+			if checks >= 1 {
+				safes2++
+			}
+		}
+	}
+
+	fmt.Println("p1: ", safes)
+	fmt.Println("p2: ", safes2)
+}
+
+func parse() ([]string, error) {
+	if len(os.Args) < 2 {
+		return nil, fmt.Errorf("no file provided")
+	}
+	filePath := os.Args[1]
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("error opening file: %v", err)
+	}
+	chunks := strings.Split(string(data), "\n")
+	var nonEmpthyChunks = []string{}
+
+	for _, chunk := range chunks {
+		if chunk != "" {
+			nonEmpthyChunks = append(nonEmpthyChunks, chunk)
+		}
+	}
+	return nonEmpthyChunks, nil
+}

2024/03/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.23.3

2024/03/main.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func calculate(x string) int {
+
+	clean1 := strings.Replace(x, "mul(", "", -1)
+	clean2 := strings.Replace(clean1, ")", "", -1)
+	splat := strings.Split(clean2, ",")
+
+	l, err := strconv.Atoi(splat[0])
+	if err != nil {
+	}
+	r, err := strconv.Atoi(splat[1])
+	if err != nil {
+	}
+
+	return l * r
+}
+
+func main() {
+
+	lines, err := parse()
+	if err != nil {
+		fmt.Println("Error:", err)
+	}
+	oneline := strings.Join(lines, "")
+
+	var p1 int = 0
+	var p2 int = 0
+
+	re := regexp.MustCompile(`mul\(\d+,\d+\)`)
+	matches := re.FindAllString(oneline, -1)
+	for i := 0; i < len(matches); i++ {
+		p1 += calculate(matches[i])
+	}
+
+	onecleanre := regexp.MustCompile(`(?s)don\'t\(\).*?do\(\)|$`)
+	oneclean := onecleanre.ReplaceAllString(oneline, "")
+
+	re2 := regexp.MustCompile(`mul\(\d+,\d+\)`)
+	matches2 := re2.FindAllString(oneclean, -1)
+	for i := 0; i < len(matches2); i++ {
+		p2 += calculate(matches2[i])
+	}
+
+	fmt.Println("p1: ", p1)
+	fmt.Println("p2: ", p2)
+}
+
+func parse() ([]string, error) {
+	if len(os.Args) < 2 {
+		return nil, fmt.Errorf("no file provided")
+	}
+	filePath := os.Args[1]
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("error opening file: %v", err)
+	}
+	chunks := strings.Split(string(data), "\n")
+	var nonEmpthyChunks = []string{}
+
+	for _, chunk := range chunks {
+		if chunk != "" {
+			nonEmpthyChunks = append(nonEmpthyChunks, chunk)
+		}
+	}
+	return nonEmpthyChunks, nil
+}

2024/04/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.23.3

2024/04/main.go

@@ -0,0 +1,126 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+
+	lines, err := parse()
+	if err != nil {
+		fmt.Println("Error:", err)
+	}
+
+	var p1 int = 0
+	var p2 int = 0
+
+	h := len(lines)
+	w := len(lines[0])
+
+	for y := 0; y < h; y++ {
+		for x := 0; x < w; x++ {
+
+			if lines[y][x] == 'X' {
+				// check right
+				if x <= len(lines[y])-4 {
+					r := string([]byte{lines[y][x+1], lines[y][x+2], lines[y][x+3]})
+					if r == "MAS" {
+						p1++
+					}
+				}
+
+				// check left
+				if x >= 3 {
+					l := string([]byte{lines[y][x-1], lines[y][x-2], lines[y][x-3]})
+					if l == "MAS" {
+						p1++
+					}
+				}
+
+				// check if up possible
+				if y >= 3 {
+					u := string([]byte{lines[y-1][x], lines[y-2][x], lines[y-3][x]})
+					if u == "MAS" {
+						p1++
+					}
+					if x >= 3 {
+						ul := string([]byte{lines[y-1][x-1], lines[y-2][x-2], lines[y-3][x-3]})
+						if ul == "MAS" {
+							p1++
+						}
+					}
+					if x < w-3 {
+						ur := string([]byte{lines[y-1][x+1], lines[y-2][x+2], lines[y-3][x+3]})
+						if ur == "MAS" {
+							p1++
+						}
+					}
+
+				}
+
+				// check down
+				if y <= h-4 {
+					d := string([]byte{lines[y+1][x], lines[y+2][x], lines[y+3][x]})
+					if d == "MAS" {
+						p1++
+					}
+					if x >= 3 {
+						dl := string([]byte{lines[y+1][x-1], lines[y+2][x-2], lines[y+3][x-3]})
+						if dl == "MAS" {
+							p1++
+						}
+					}
+					if x < w-3 {
+						dr := string([]byte{lines[y+1][x+1], lines[y+2][x+2], lines[y+3][x+3]})
+						if dr == "MAS" {
+							p1++
+						}
+					}
+				}
+			}
+
+			if lines[y][x] == 'A' {
+				if y >= 1 && y < h-1 && x >= 1 && x < w-1 {
+					check := string([]byte{lines[y-1][x-1], lines[y-1][x+1], lines[y+1][x-1], lines[y+1][x+1]})
+					if check == "MSMS" {
+						p2++
+					}
+					if check == "SMSM" {
+						p2++
+					}
+					if check == "MMSS" {
+						p2++
+					}
+					if check == "SSMM" {
+						p2++
+					}
+				}
+			}
+		}
+	}
+
+	fmt.Println("p1: ", p1)
+	fmt.Println("p2: ", p2)
+}
+
+func parse() ([]string, error) {
+	if len(os.Args) < 2 {
+		return nil, fmt.Errorf("no file provided")
+	}
+	filePath := os.Args[1]
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("error opening file: %v", err)
+	}
+	chunks := strings.Split(string(data), "\n")
+	var nonEmpthyChunks = []string{}
+
+	for _, chunk := range chunks {
+		if chunk != "" {
+			nonEmpthyChunks = append(nonEmpthyChunks, chunk)
+		}
+	}
+	return nonEmpthyChunks, nil
+}

2024/05/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.23.3

2024/05/main.go

@@ -0,0 +1,102 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func contains(s []int, e int) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}
+
+func check(nums []int, maps map[int][]int) bool {
+	correct := true
+	for i := 0; i < len(nums); i++ {
+		var checking = nums[i]
+		for j := 0; j < len(nums); j++ {
+
+			if !contains(maps[checking], nums[j]) {
+				if i < j {
+					correct = false
+				}
+			}
+		}
+	}
+
+	return correct
+}
+
+func main() {
+
+	lines, err := parse()
+	if err != nil {
+		fmt.Println("Error:", err)
+	}
+
+	var p1 int = 0
+	var p2 int = 0
+
+	maps := make(map[int][]int)
+
+	for y := 0; y < len(lines); y++ {
+		if lines[y] != "" && lines[y][2] == '|' {
+			split := strings.Split(lines[y], "|")
+			l, err := strconv.Atoi(split[0])
+			if err != nil {
+				panic(err)
+			}
+			r, err := strconv.Atoi(split[1])
+			if err != nil {
+				panic(err)
+			}
+			maps[l] = append(maps[l], r)
+		}
+
+		if lines[y] != "" && lines[y][2] == ',' {
+			numsstr := strings.Split(lines[y], ",")
+			var nums []int
+
+			for i := 0; i < len(numsstr); i++ {
+				x, err := strconv.Atoi(numsstr[i])
+				if err != nil {
+					panic(err)
+				}
+				nums = append(nums, x)
+			}
+
+			if check(nums, maps) {
+				p1 += nums[len(nums)/2]
+			}
+		}
+	}
+
+	fmt.Println("p1: ", p1)
+	fmt.Println("p2: ", p2)
+}
+
+func parse() ([]string, error) {
+	if len(os.Args) < 2 {
+		return nil, fmt.Errorf("no file provided")
+	}
+	filePath := os.Args[1]
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("error opening file: %v", err)
+	}
+	chunks := strings.Split(string(data), "\n")
+	var nonEmpthyChunks = []string{}
+
+	for _, chunk := range chunks {
+		if chunk != "" {
+			nonEmpthyChunks = append(nonEmpthyChunks, chunk)
+		}
+	}
+	return nonEmpthyChunks, nil
+}