first commit

2023/day04/main.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"slices"
+	"strconv"
+	"strings"
+)
+
+type Data struct {
+	CardNr     int
+	WinNumber  []int
+	YourNumber []int
+}
+
+func convertStringToInt(s []string) []int {
+	var result []int
+	for _, x := range s {
+		inti, err := strconv.Atoi(x)
+		if err != nil {
+			return nil
+		}
+		result = append(result, inti)
+	}
+	return result
+}
+func getData(s string) []string {
+	var result []string
+	fileReader, err := os.Open(s)
+	if err != nil {
+		return nil
+	}
+	fileScanner := bufio.NewScanner(fileReader)
+	fileScanner.Split(bufio.ScanLines)
+	for fileScanner.Scan() {
+		result = append(result, fileScanner.Text())
+	}
+	return result
+}
+func convertToUsefulData(s []string) []Data {
+	var result []Data
+	for i, line := range s {
+		spl := strings.Split(line, ":")
+		numbers := strings.Split(spl[1], "|")
+		win := strings.Fields(numbers[0])
+		your := strings.Fields(numbers[1])
+		result = append(result, Data{CardNr: i, WinNumber: convertStringToInt(win), YourNumber: convertStringToInt(your)})
+	}
+	return result
+}
+
+func main() {
+	fmt.Println("Go Fast!")
+	data := convertToUsefulData(getData("./data"))
+	fmt.Println(data)
+	Part1(data)
+}
+
+func Part1(data []Data) {
+	var result int
+	for i, _ := range data {
+		var count int
+		for j, _ := range data[i].YourNumber {
+			if slices.Contains(data[i].WinNumber, data[i].YourNumber[j]) {
+				if count == 0 {
+					count++
+				} else {
+					count *= 2
+				}
+			}
+		}
+		result += count
+		fmt.Printf("card %d Points: %d\n", i, count)
+	}
+	fmt.Println("The result is: ", result)
+}