Solved part2

01/code.go

@@ -8,33 +8,32 @@ import (
 	"strconv"
 )
 
-func readInput(file *os.File) ([]int, int) {
+func readInput(file *os.File) [3]int {
 	scanner := bufio.NewScanner(file)
-	numbers := []int{0}
-	index := 0
-	max := 0
+	var numbers [3]int
+	current := 0
 
 	for scanner.Scan() {
 		line := scanner.Text()
 		if line == "" {
-			if numbers[index] > max {
-				max = numbers[index]
+			for i := range numbers {
+				if current > numbers[i] {
+					current, numbers[i] = numbers[i], current
+				}
 			}
 
-			index++
-			numbers = append(numbers, 0)
-
+			current = 0
 			continue
 		}
 
 		if number, err := strconv.Atoi(line); err == nil {
-			numbers[index] += number
+			current += number
 		} else {
 			log.Fatal("Numbers: ", err)
 		}
 	}
 
-	return numbers, max
+	return numbers
 }
 
 func main() {
@@ -49,6 +48,7 @@ func main() {
 
 	}
 
-	_, max := readInput(file)
-	fmt.Println("Part1:", max)
+	numbers := readInput(file)
+	fmt.Println("Part1:", numbers[0])
+	fmt.Println("Part2:", numbers[0]+numbers[1]+numbers[2])
 }