01.1, 01.2

01/01.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"slices"
+	"strconv"
+	"strings"
+)
+
+func Abs(x int) int {
+	if x < 0 {
+		return -x
+	}
+	return x
+}
+
+func main() {
+	bytes, err := os.ReadFile("./input.txt")
+	if err != nil {
+		panic(err)
+	}
+	lists := strings.Split(strings.Trim(string(bytes[:]), "\n"), "\n")
+	a := make([]int, len(lists))
+	b := make([]int, len(lists))
+	for i := 0; i < len(lists); i++ {
+		x := strings.Split(lists[i], "   ")
+		if t, e := strconv.Atoi(x[0]); e == nil {
+			a[i] = t
+		}
+		if t, e := strconv.Atoi(x[1]); e == nil {
+			b[i] = t
+		}
+	}
+	slices.Sort(a)
+	slices.Sort(b)
+	s := 0
+	for i := 0; i < len(a); i++ {
+		s += Abs(a[i] - b[i])
+	}
+	fmt.Println(s)
+	s = 0
+	for i := 0; i < len(a); i++ {
+		c := 0
+		for j := 0; j < len(b); j++ {
+			if a[i] == b[j] {
+				c += 1
+			}
+		}
+		s += a[i] * c
+	}
+	fmt.Println(s)
+}