From 84fd173a98024897b63c09bf361268f22bcd8c3e Mon Sep 17 00:00:00 2001
From: Seth Etter <mail@sethetter.com>
Date: Sat, 18 Apr 2026 17:29:30 -0500
Subject: [PATCH] 2025 day01 part2

---
 2025/day01/main.go | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/2025/day01/main.go b/2025/day01/main.go
index a12796a..fbad867 100644
--- a/2025/day01/main.go
+++ b/2025/day01/main.go
@@ -17,28 +17,43 @@ func main() {
 
 	// starting position
 	pos := 50
-	timesAtZero := 0
+	part1 := 0
+	part2 := 0
 
 	scanner := bufio.NewScanner(inputf)
 	for scanner.Scan() {
 		line := scanner.Text()
+
 		turn, err := parseTurn(line)
 		if err != nil {
 			log.Fatalf("failed to parse turn: %v", err)
 		}
 
+		prevPos := pos
 		pos = turn.apply(pos)
 
+		// part 1
 		if pos == 0 {
-			timesAtZero++
+			part1++
 		}
+
+		// part 2
+		p := prevPos
+
+		// mirror the value so we can treat this as a right rotation
+		if turn.dir == left {
+			p = (100 - prevPos) % 100
+		}
+
+		part2 += (p + turn.count) / 100
 	}
 
 	if err := scanner.Err(); err != nil {
 		log.Fatalf("scanner error: %v", err)
 	}
 
-	fmt.Println(timesAtZero)
+	fmt.Printf("part1: %d\n", part1)
+	fmt.Printf("part2: %d\n", part2)
 }
 
 type turn struct {
-- 
2.51.2