AoC 2020: day4

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

2018/day_08/main.go

@@ -1,81 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"log"
-	"os"
-	"strconv"
-	"strings"
-)
-
-type node struct {
-	children []*node
-	metadata []int
-}
-
-func treeRecursiveBuild(info *[]int) (*node, int) {
-	n := &node{}
-	metaSum := 0
-	childNum := (*info)[0]
-	metaNum := (*info)[1]
-
-	*info = (*info)[2:]
-
-	for i := 0; i < childNum; i++ {
-		children, s := treeRecursiveBuild(info)
-		metaSum += s
-		n.children = append(n.children, children)
-	}
-
-	for i := 0; i < metaNum; i++ {
-		metaSum += (*info)[0]
-		n.metadata = append(n.metadata, (*info)[0])
-		if len(*info) > 0 {
-			*info = (*info)[1:]
-		}
-	}
-
-	return n, metaSum
-}
-
-func (n *node) value() int {
-	value := 0
-	if len(n.children) == 0 {
-		for _, m := range n.metadata {
-			value += m
-		}
-	} else {
-		for _, m := range n.metadata {
-			if m <= len(n.children) {
-				value += n.children[m-1].value()
-			}
-		}
-	}
-	return value
-}
-
-func main() {
-	var info []int
-	file, err := os.Open("./input")
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer file.Close()
-
-	scan := bufio.NewScanner(file)
-	scan.Scan()
-	line := scan.Text()
-
-	for _, n := range strings.Split(line, " ") {
-		num, _ := strconv.Atoi(n)
-		info = append(info, num)
-	}
-
-	root, metaSum := treeRecursiveBuild(&info)
-
-	fmt.Printf("Part One: %v\n", metaSum)
-
-	fmt.Printf("Part Two: %v\n", root.value())
-
-}