p2 + clean up

2024/01/go.mod

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

2024/01/main.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+func main() {
+
+	lines := parse()
+
+	// var first = 0
+	// var last = 0
+
+	var left = []int{}
+	var right = []int{}
+
+	for _, line := range lines {
+
+		if line == "" {
+			continue
+		}
+
+		nums := strings.Fields(line)
+
+		l, _ := strconv.Atoi(nums[0])
+		r, _ := strconv.Atoi(nums[1])
+		left = append(left, l)
+		right = append(right, r)
+
+	}
+
+	sort.Ints(left)
+	sort.Ints(right)
+
+	var sum = 0
+
+	for i := 0; i < len(left); i++ {
+		var diff = right[i] - left[i]
+		if diff < 0 {
+			diff *= -1
+		}
+		sum += diff
+	}
+
+	var similarity = 0
+
+	for i := 0; i < len(left); i++ {
+		var count = 0
+		for j := 0; j < len(right); j++ {
+			if left[i] == right[j] {
+				count += 1
+			}
+		}
+		similarity += count * left[i]
+	}
+	fmt.Println(sum)
+	fmt.Println(similarity)
+
+}
+
+func parse() []string {
+	filePath := os.Args[1]
+	data, _ := os.ReadFile(filePath)
+	chunks := strings.Split(string(data), "\n")
+	return chunks
+}