Bruno BELANYI
b4762ccf9f
Having just the one tool is better. Incidentally, this fixes the ternary formatting, which was messed up in recent `black` versions.
69 lines
2 KiB
Python
Executable file
69 lines
2 KiB
Python
Executable file
#!/usr/bin/env python
|
|
|
|
import sys
|
|
from typing import Union
|
|
|
|
FileSystem = dict[str, Union[int, "FileSystem"]]
|
|
|
|
|
|
def solve(input: list[str]) -> int:
|
|
def build_tree(input: list[str], i: int = 0) -> tuple[FileSystem, int]:
|
|
fs: FileSystem = {}
|
|
|
|
while i < len(input):
|
|
assert input[i][0] == "$" # Sanity check
|
|
command = input[i].split()[1:]
|
|
if command[0] == "ls":
|
|
while (i := i + 1) < len(input):
|
|
if input[i][0] == "$":
|
|
break
|
|
else:
|
|
type, name = input[i].split()
|
|
if type == "dir":
|
|
continue
|
|
fs[name] = int(type)
|
|
elif command[0] == "cd":
|
|
if command[1] == "..":
|
|
i += 1
|
|
break
|
|
else:
|
|
fs[command[1]], i = build_tree(input, i + 1)
|
|
else:
|
|
assert False # Sanity check
|
|
|
|
return fs, i
|
|
|
|
def total_size(
|
|
fs: FileSystem, parent_path: str = ""
|
|
) -> dict[str, tuple[int, bool]]:
|
|
sizes: dict[str, tuple[int, bool]] = {}
|
|
|
|
for f, content in fs.items():
|
|
path = f"{parent_path}/{f}"
|
|
if isinstance(content, int):
|
|
sizes[path] = content, False
|
|
elif isinstance(content, dict):
|
|
children_sizes = total_size(content, path)
|
|
total = sum(children_sizes[f"{path}/{c}"][0] for c in content.keys())
|
|
sizes[path] = total, True
|
|
sizes.update(children_sizes)
|
|
else:
|
|
assert False # Sanity check
|
|
|
|
return sizes
|
|
|
|
fs, i = build_tree(input)
|
|
assert i == len(input) # Sanity check
|
|
sizes = total_size(fs)
|
|
THRESHOLD = 100000
|
|
return sum(size for size, is_dir in sizes.values() if is_dir and size <= THRESHOLD)
|
|
|
|
|
|
def main() -> None:
|
|
input = sys.stdin.read().splitlines()
|
|
print(solve(input))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|