2023: Day 6

internal/2023/day_06/in.go

@@ -1,11 +1,67 @@
 package day_06
 
+import (
+	"fmt"
+	"regexp"
+	"strings"
+
+	"rpjosh.de/adventOfCode/pkg/utils"
+)
+
 type Day struct{}
 
 func (d *Day) Part1(in string) string {
-	return ""
+
+	// Regex to get all numbers
+	numberRegex := regexp.MustCompile(`\d+`)
+	inSplit := strings.Split(in, "\n")
+	rtc := 1
+
+	raceTimes := numberRegex.FindAllString(inSplit[0], -1)
+	raceDistances := numberRegex.FindAllString(inSplit[1], -1)
+
+	// Loop through every race and find possible button hold values
+	for i := 0; i < len(raceTimes); i++ {
+		time := utils.ToInt(raceTimes[i])
+		distance := utils.ToInt(raceDistances[i])
+
+		// Brute force every possibility and check if the distance could be bet
+		possiblities := 0
+		for holding := time; holding > 0; holding -= 1 {
+			pDistance := (time - holding) * holding
+
+			if pDistance > distance {
+				possiblities += 1
+			}
+		}
+
+		rtc *= possiblities
+	}
+
+	return fmt.Sprintf("%d", rtc)
 }
 
 func (d *Day) Part2(in string) string {
-	return ""
+	// Regex to get all numbers
+	numberRegex := regexp.MustCompile(`\d+`)
+	inSplit := strings.Split(in, "\n")
+
+	raceTimes := strings.Join(numberRegex.FindAllString(inSplit[0], -1), "")
+	raceDistances := strings.Join(numberRegex.FindAllString(inSplit[1], -1), "")
+
+	// Loop through every race and find possible button hold values
+	time := utils.ToInt(raceTimes)
+	distance := utils.ToInt(raceDistances)
+
+	// Brute force every possibility and check if the distance could be bet
+	possiblities := 0
+	for holding := time; holding > 0; holding -= 1 {
+		pDistance := (time - holding) * holding
+
+		if pDistance > distance {
+			possiblities += 1
+		}
+	}
+
+	return fmt.Sprintf("%d", possiblities)
 }