(Go) day 8 part 1 done

08/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+type Node struct {
+	Metadata []int
+	Children []Node
+}
+
+func parseNode(input []int, start int) (parsed Node, end int) {
+	numChildren := input[start]
+	numMeta := input[start+1]
+	start += 2
+	for i := 0; i < numChildren; i++ {
+		var child Node
+		child, start = parseNode(input, start)
+		parsed.Children = append(parsed.Children, child)
+	}
+	for i := 0; i < numMeta; i++ {
+		parsed.Metadata = append(parsed.Metadata, input[start])
+		start++
+	}
+	return parsed, start
+}
+
+func metaSum(root Node) (sum int) {
+	for _, c := range root.Children {
+		sum += metaSum(c)
+	}
+	for _, m := range root.Metadata {
+		sum += m
+	}
+	return sum
+}
+
+func main() {
+	inFile, _ := ioutil.ReadFile("input")
+	rawInput := strings.Split(string(inFile), " ")
+	input := make([]int, len(rawInput))
+	for i, s := range rawInput {
+		input[i], _ = strconv.Atoi(s)
+	}
+	root, _ := parseNode(input, 0)
+	fmt.Println(metaSum(root))
+}