added 2024 part 2

2024/01/Go/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+	"math"
+	"os"
+	"slices"
+	"strconv"
+	"strings"
+)
+
+func check(e error) {
+    if e != nil {
+        panic(e)
+    }
+}
+
+func sumArray(list []int) int {
+	result := 0
+	for _, item := range list{
+		result += item
+	}
+	return result
+}
+
+func main() {
+	data, err := os.ReadFile("./input.txt")
+	check(err)
+	//fmt.Println(string(data))
+	dataRows := strings.Split(string(data), "\r\n")
+	var leftList []int
+	var rightList []int
+	var diffList []int
+	//fmt.Println(dataRows)
+	for _, row := range dataRows {
+		l, _ := strconv.Atoi(strings.Split(row, "   ")[0])
+		r, _ := strconv.Atoi(strings.Split(row, "   ")[1])
+		leftList = append(leftList, l)
+		rightList = append(rightList, r)
+	}
+	//fmt.Println(rightList)
+	slices.Sort(leftList)
+	slices.Sort(rightList)
+	//fmt.Println(leftList)
+	//fmt.Println(rightList)
+	for idx, l := range leftList {
+		diffList = append(diffList, int(math.Abs(float64(rightList[idx] - l))))
+	}
+	//fmt.Println(diffList)
+	fmt.Println(sumArray(diffList))
+}