AoC 2024, Day 1: Solve Part 1

Author: codeguru42

go/2024/day01.go

@@ -3,7 +3,9 @@ package main
 import (
 	"bufio"
 	"fmt"
+	"math"
 	"os"
+	"sort"
 	"strconv"
 	"strings"
 )
@@ -25,13 +27,25 @@ func main() {
 		line := scanner.Text()
 		pair := strings.Split(line, " ")
 		p1, _ := strconv.Atoi(pair[0])
-		p2, _ := strconv.Atoi(pair[1])
+		p2, _ := strconv.Atoi(pair[3])
 		left = append(left, p1)
-		right = append(left, p2)
+		right = append(right, p2)
 	}
 
-	fmt.Println(left)
-	fmt.Println(right)
+	sort.Slice(left, func(i, j int) bool { return left[i] < left[j] })
+	sort.Slice(right, func(i, j int) bool { return right[i] < right[j] })
+
+	var diffs []float64
+	for i, val := range left {
+		diffs = append(diffs, math.Abs(float64(val-right[i])))
+	}
+
+	var sum float64 = 0
+	for _, val := range diffs {
+		sum += val
+	}
+
+	fmt.Println(int(sum))
 
 	if err := scanner.Err(); err != nil {
 		panic(err)