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86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
from typing import Optional
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from utils.input import read_input_lines
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class Directory:
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def __init__(self, name: str, parent: Optional["Directory"]) -> None:
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self.name = name
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self.parent = parent if parent is not None else self
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self.child_directories = dict()
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self.child_files = dict()
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self.total_size = None
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def record_directory(self, name: str) -> None:
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if name not in self.child_directories:
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self.child_directories[name] = Directory(name, self)
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self.total_size = None
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def record_file(self, name: str, size: int) -> None:
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self.child_files[name] = size
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self.total_size = None
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def get_size(self) -> int:
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if self.total_size is None:
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self.total_size = sum(self.child_files.values()) + sum(child.get_size() for child in self.child_directories.values())
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return self.total_size
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def collect_directories(self, target_list: list["Directory"]) -> None:
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target_list.append(self)
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for child in self.child_directories.values():
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child.collect_directories(target_list)
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class Session:
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def __init__(self) -> None:
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self.root_directory = Directory("/", None)
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self.current_directory = self.root_directory
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def handle_command(self, command: str) -> None:
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if command == "ls":
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return
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(left, right) = command.split(" ", maxsplit = 1)
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if left == "cd":
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if right == "/":
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self.current_directory = self.root_directory
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elif right == "..":
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self.current_directory = self.current_directory.parent
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else:
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self.current_directory = self.current_directory.child_directories[right]
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def handle_listing(self, size_or_type: str, name: str) -> None:
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if size_or_type == "dir":
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self.current_directory.record_directory(name)
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else:
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self.current_directory.record_file(name, int(size_or_type))
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session = Session()
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for line in read_input_lines():
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(left, right) = line.split(" ", maxsplit = 1)
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if left == "$":
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session.handle_command(right)
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else:
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session.handle_listing(left, right)
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all_directories = list()
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session.root_directory.collect_directories(all_directories)
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total_size_of_interesting_directories = sum(directory.get_size() for directory in all_directories if directory.get_size() <= 100_000)
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print(f"Total size of interesting directories: {total_size_of_interesting_directories}")
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total_disk_size = 70_000_000
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needed_free_disk_size = 30_000_000
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current_free_disk_size = total_disk_size - session.root_directory.get_size()
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minimum_folder_size_to_delete = needed_free_disk_size - current_free_disk_size
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size_of_deleted_folder = min(folder.get_size() for folder in all_directories if folder.get_size() >= minimum_folder_size_to_delete)
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print(f"Size of deleted folder: {size_of_deleted_folder}")
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