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advent-20
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improve performance of day 7 part 1

master
Araozu 2024-03-11 18:40:19 -05:00
parent 265072a72f
commit a1018af799
1 changed files with 10 additions and 9 deletions
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19
solutions/day07.go
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@ -57,21 +57,20 @@ func parseBagStatement(bagStatement string) Bag {
return Bag{color: bagColor, contents: bagContents, contentsCount: -1} return Bag{color: bagColor, contents: bagContents, contentsCount: -1}
} }
func bagContainsShinyGold(bag *Bag, bagMap map[string]Bag) bool { func bagContainsShinyGold(bagColor string, bagMap map[string]Bag) bool {
bag := bagMap[bagColor]
if bag.containsShinyGold { if bag.containsShinyGold {
return true return true
} }
// recursively search // recursively search
for _, bagName := range bag.contents { for _, nextBag := range bag.contents {
if bagName.color == "shiny gold" { if nextBag.color == "shiny gold" {
bag.containsShinyGold = true bag.containsShinyGold = true
return true return true
} }
nextBag := bagMap[bagName.color] if bagContainsShinyGold(nextBag.color, bagMap) {
if bagContainsShinyGold(&nextBag, bagMap) {
bag.containsShinyGold = true bag.containsShinyGold = true
return true return true
} }
@ -85,18 +84,20 @@ func Day07Part01(isTest bool) int {
groups := strings.Split(input, "\n") groups := strings.Split(input, "\n")
bags := make(map[string]Bag) bags := make(map[string]Bag)
bagColors := make([]string, len(groups))
// parse and collect the bags // parse and collect the bags
for _, statement := range groups { for i, statement := range groups {
parsedBag := parseBagStatement(statement) parsedBag := parseBagStatement(statement)
bags[parsedBag.color] = parsedBag bags[parsedBag.color] = parsedBag
bagColors[i] = parsedBag.color
} }
shinyGoldContainers := 0 shinyGoldContainers := 0
// process the bags // process the bags
for _, bag := range bags { for _, bagColor := range bagColors {
if bagContainsShinyGold(&bag, bags) { if bagContainsShinyGold(bagColor, bags) {
shinyGoldContainers += 1 shinyGoldContainers += 1
} }
} }