From 04c1a5259a17fb6530477f731c57f2fffd94515c Mon Sep 17 00:00:00 2001
From: Kees van Kempen <git@keesvankempen.nl>
Date: Wed, 18 Dec 2024 23:53:19 +0100
Subject: [PATCH] 2024(4): getting there, but not yet

---
 2024/4/puzzle1.py | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/2024/4/puzzle1.py b/2024/4/puzzle1.py
index 3735e62..384a0a4 100644
--- a/2024/4/puzzle1.py
+++ b/2024/4/puzzle1.py
@@ -1,3 +1,5 @@
+import itertools
+
 
 def scan_line(line):
 	to_find = "XMAS"
@@ -5,9 +7,19 @@ def scan_line(line):
 	return line.count(to_find)
 
 def transpose(list_2d):
-	return list(zip(*list_2d))
+	#return list(zip(*list_2d))
+	#return list(map(list, zip(*list_2d)))
+	#return list(map(list, itertools.zip_longest(*list_2d, fillvalue=None)))
+	outlist = []
+	for j in range(len(list_2d[0])):
+		outlist.append([])
+		for i in range(len(list_2d)):
+			outlist[j].append(list_2d[i][j])
+		outlist[j] = "".join(outlist[j])
+	return outlist
 
 def rotate(list_2d):
+	#print(list_2d)
 	x_max, y_max = len(list_2d), len(list_2d[0])
 	diagonal_list = []
 
@@ -16,21 +28,22 @@ def rotate(list_2d):
 		substring = ""
 		x = i
 		y = 0
-		#while x < x_max and y < y_max:
-		# TODO: Snapperniksvan -- Kees
-		while x < x_max and y < len(list_2d[x]):
-			print(x, x_max, y, y_max)
+		while x < x_max and y < y_max:
+			#print(x, x_max, y, y_max)
 			substring += list_2d[x][y]
 			x += 1
 			y += 1
 		diagonal_list.append(substring)	
 
+	# Reverse
+	diagonal_list = diagonal_list[::-1]
+
 	# Diagonals starting from (0,1), for the first column.
 	for j in range(1, y_max):
 		substring = ""
 		x = 0
 		y = j
-		while x < x_max and y < y_max:
+		while x < x_max and y < len(list_2d[x]):
 			substring += list_2d[x][y]
 			x += 1
 			y += 1
@@ -42,7 +55,8 @@ if __name__ == "__main__":
 	result = 0
 	
 	with open("input", "r") as fp:
-		full_string = fp.read().split("\n") 
+		# Skip last line as it is empty
+		full_string = fp.read().split("\n")[:-1]
 		for line in full_string:
 			result += scan_line(line)
 			result += scan_line(line[::-1])
@@ -54,7 +68,8 @@ if __name__ == "__main__":
 		for line in full_string:
 			result += scan_line(line)
 			result += scan_line(line[::-1])
-		for line in transpose(full_string):
+		print(result)
+		for line in rotate(transpose(full_string)):
 			result += scan_line(line)
 			result += scan_line(line[::-1])