Day 5 part 2

main.go

@@ -20,7 +20,7 @@ func main() {
 	runAndBenchmark("04", "2", false, solutions.Day04Part02)
 
 	runAndBenchmark("05", "1", false, solutions.Day05Part01)
-	runAndBenchmark("05", "2", true, solutions.Day05Part02)
+	runAndBenchmark("05", "2", false, solutions.Day05Part02)
 }
 
 type execute func(bool) int

solutions/day05.go

@@ -2,11 +2,12 @@ package solutions
 
 import (
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 )
 
-func seatToValue(seat string) (int, int, int) {
+func seatStrToSeatId(seat string) int {
 	lowRegex := regexp.MustCompile("[FL]")
 	highRegex := regexp.MustCompile("[BR]")
 
@@ -16,7 +17,7 @@ func seatToValue(seat string) (int, int, int) {
 	row, _ := strconv.ParseInt(seatStr[:7], 2, 64)
 	column, _ := strconv.ParseInt(seatStr[7:], 2, 64)
 
-	return int(row), int(column), int(row*8 + column)
+	return int(row*8 + column)
 }
 
 func Day05Part01(isTest bool) int {
@@ -26,7 +27,7 @@ func Day05Part01(isTest bool) int {
 	highestSeatId := 0
 
 	for _, seat := range seats {
-		_, _, seatId := seatToValue(seat)
+		seatId := seatStrToSeatId(seat)
 		if seatId > highestSeatId {
 			highestSeatId = seatId
 		}
@@ -36,5 +37,27 @@ func Day05Part01(isTest bool) int {
 }
 
 func Day05Part02(isTest bool) int {
+	input := ReadInput("05", isTest)
+	seats := strings.Split(input, "\n")
+	seatsAmount := len(seats)
+
+	seatIds := make([]int, seatsAmount)
+
+	for i, seat := range seats {
+		seatId := seatStrToSeatId(seat)
+		seatIds[i] = seatId
+	}
+
+	slices.Sort(seatIds)
+
+	for i := 0; i < seatsAmount-1; i++ {
+		el1 := seatIds[i]
+		el2 := seatIds[i+1]
+
+		if el2-el1 == 2 {
+			return el1 + 1
+		}
+	}
+
 	return -1
 }