1 files changed, 85 insertions, 0 deletions
diff --git a/2023/Go/internal/day_06/part_01/part_01.go b/2023/Go/internal/day_06/part_01/part_01.go
new file mode 100644
index 0000000..5735924
--- /dev/null
+++ b/2023/Go/internal/day_06/part_01/part_01.go
@@ -0,0 +1,85 @@
+package part_01
+
+import (
+	"os"
+	"strconv"
+	"strings"
+)
+
+const USE_SAMPLE = false
+
+/**
+ * Tried:
+ * - 72128 (too low)
+ * - 3317888 (correct!)
+ */
+func Solve() {
+	var filePath string
+	if USE_SAMPLE {
+		filePath = "../_input/day_06_part_01_sample.txt"
+	} else {
+		filePath = "../_input/day_06.txt"
+	}
+	contents, _ := os.ReadFile(filePath)
+
+	lines := strings.Split(string(contents), "\r\n")
+
+	timeLine := lines[0]
+	times := parseTimeLine(timeLine)
+
+	distLine := lines[1]
+	distances := parseDistanceLine(distLine)
+
+	answer := calculateAnswer(times, distances)
+
+	println(answer)
+}
+
+func parseTimeLine(timeLine string) []int {
+	prefix := "Time:"
+	return parseLine(prefix, timeLine)
+}
+
+func parseDistanceLine(distLine string) []int {
+	prefix := "Distance:"
+	return parseLine(prefix, distLine)
+}
+
+func parseLine(prefix string, line string) []int {
+	withoutTitle := strings.TrimPrefix(line, prefix)
+
+	numbers := []int{}
+	for _, number := range strings.Split(withoutTitle, " ") {
+		if number == "" {
+			continue
+		}
+		numberInt, _ := strconv.Atoi(number)
+		numbers = append(numbers, numberInt)
+	}
+	return numbers
+}
+
+func calculateAnswer(times []int, distances []int) int {
+	answer := 1
+	for i, maxTime := range times {
+		recordDistance := distances[i]
+
+		var greaterThanRecord []int
+		for buttonPressedFor := 0; buttonPressedFor <= maxTime; buttonPressedFor++ {
+			distance := calculateDistance(buttonPressedFor, maxTime)
+			if distance > recordDistance {
+				greaterThanRecord = append(greaterThanRecord, distance)
+			}
+		}
+
+		if len(greaterThanRecord) > 0 {
+			answer *= len(greaterThanRecord)
+		}
+	}
+
+	return answer
+}
+
+func calculateDistance(buttonPressedFor int, maxTime int) int {
+	return buttonPressedFor * (maxTime - buttonPressedFor)
+}