From 945d63e8e1e6571da5eaa95557abac125db26225 Mon Sep 17 00:00:00 2001
From: Kees van Kempen <git@keesvankempen.nl>
Date: Sun, 29 Dec 2024 03:01:43 +0100
Subject: [PATCH] 2024(9): part 2 WIP

---
 2024/09/part2.py | 69 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 2024/09/part2.py

diff --git a/2024/09/part2.py b/2024/09/part2.py
new file mode 100644
index 0000000..18ad5e6
--- /dev/null
+++ b/2024/09/part2.py
@@ -0,0 +1,69 @@
+from part1 import *
+
+
+verbose = True
+
+def disk_map_to_files(disk_map: str) -> list:
+	files = []
+	for i, s in enumerate(disk_map):
+		# file
+		if i % 2 == 0:
+			ID = i // 2
+			files += [int(s) * [str(ID)]]
+
+		# free space
+		else:
+			files += [int(s) * "."]
+
+	return files
+
+def move_files_ltr_to_empty_space(files: list) -> str:
+	left = 0
+	right = len(files) - 1
+
+	while left < right:
+		if not "." in files[left]:
+			left += 1
+		elif "." in files[right] \
+		  or files[left].count(".") < len(files[right]):
+			right -= 1
+		# fully swap
+		elif files[left].count(".") == len(files[right]):
+			tmp = files[left]
+			files[left] = files[right]
+			files[right] = tmp
+		# partially swap
+		else:
+			tmp = files[left]
+			files[left] = files[right]
+			files.insert(left + 1, tmp[:-len(files[right])])
+			files[right] = tmp[len(files[right])]
+		
+		if verbose:
+			print(files)
+
+	return files
+
+def files_to_blocks(files: list) -> str:
+	for f in files:
+		print(f)
+	return sum(files)
+
+if __name__ == "__main__":
+	disk_map = load_disk_map("testinput")
+	if verbose:
+		print("Disk map:")
+		print(disk_map)
+		print()
+
+	files = disk_map_to_files(disk_map)
+	if verbose:
+		print("Files:")
+		print(files)
+
+	result = move_files_ltr_to_empty_space(files)
+
+	if verbose:
+		print()
+		print("Checksum:")
+	print(checksum(files_to_blocks(result)))