From bcce0722fb1f6aaef3a76416e23f5881f5cbe99f Mon Sep 17 00:00:00 2001
From: Araozu <fernando@araozu.dev>
Date: Sun, 25 Feb 2024 16:37:21 -0500
Subject: [PATCH] Day 3 part 1

---
 main.go            |  7 +++++--
 solutions/day03.go | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 2 deletions(-)
 create mode 100644 solutions/day03.go

diff --git a/main.go b/main.go
index b6eebd1..f1978c4 100644
--- a/main.go
+++ b/main.go
@@ -10,8 +10,11 @@ func main() {
 	runAndBenchmark("01", "1", false, solutions.Day01Part01)
 	runAndBenchmark("01", "2", false, solutions.Day01Part02)
 
-	runAndBenchmark("02", "1", false, solutions.Day01Part01)
-	runAndBenchmark("02", "2", false, solutions.Day01Part02)
+	runAndBenchmark("02", "1", false, solutions.Day02Part01)
+	runAndBenchmark("02", "2", false, solutions.Day02Part02)
+
+	runAndBenchmark("03", "1", false, solutions.Day03Part01)
+	runAndBenchmark("03", "2", true, solutions.Day03Part02)
 }
 
 type execute func(bool) int
diff --git a/solutions/day03.go b/solutions/day03.go
new file mode 100644
index 0000000..0610592
--- /dev/null
+++ b/solutions/day03.go
@@ -0,0 +1,36 @@
+package solutions
+
+import "strings"
+
+func countTrees(input string, left, down int) int {
+	verticalPos := down
+	horizontalPos := left
+	lines := strings.Split(input, "\n")
+	width := len(lines[0])
+	treesCount := 0
+
+	for verticalPos < len(lines) {
+		line := lines[verticalPos]
+		charAt := string(line[horizontalPos])
+
+		if charAt == "#" {
+			treesCount += 1
+		}
+
+		horizontalPos += left
+		horizontalPos = horizontalPos % width
+		verticalPos += down
+	}
+
+	return treesCount
+}
+
+func Day03Part01(isTest bool) int {
+	input := ReadInput("03", isTest)
+
+	return countTrees(input, 3, 1)
+}
+
+func Day03Part02(isTest bool) int {
+	return -1
+}