From ce0ccaaafac86acef493c58bd1828bfef2c0bb12 Mon Sep 17 00:00:00 2001
From: Gabriel Bizdoc <gabriel.bizdoc@gmail.com>
Date: Thu, 4 Dec 2025 09:11:40 +0200
Subject: [PATCH] day 4 cleanup

---
 year25/day4.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/year25/day4.go b/year25/day4.go
index ba39269..8d84909 100644
--- a/year25/day4.go
+++ b/year25/day4.go
@@ -11,6 +11,7 @@ const Day4PaperRoll = '@'
 
 func Day4Part1(r io.Reader, l Logger) (any, error) {
 	// 4 rolls in 8 adjacent positions
+	const maxAdjacentRolls = 4
 
 	var accessibleRolls int
 	g, err := geometry.ReaderToByteGrid(r)
@@ -30,7 +31,7 @@ func Day4Part1(r io.Reader, l Logger) (any, error) {
 			}
 		}
 
-		if count <= 4 {
+		if count <= maxAdjacentRolls {
 			accessibleRolls += 1
 		}
 	}
@@ -40,6 +41,7 @@ func Day4Part1(r io.Reader, l Logger) (any, error) {
 
 func Day4Part2(r io.Reader, l Logger) (any, error) {
 	// 4 rolls in 8 adjacent positions
+	const maxAdjacentRolls = 4
 
 	var totalRemovedRolls int
 	g, err := geometry.ReaderToByteGrid(r)
@@ -61,7 +63,7 @@ func Day4Part2(r io.Reader, l Logger) (any, error) {
 				}
 			}
 
-			if count <= 4 {
+			if count <= maxAdjacentRolls {
 				removedRolls += 1
 				g.Set(c, '.') // remove grid
 			}