d8: add data
parent
b2602f9666
commit
0547d489ba
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@ -1,23 +1,5 @@
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$ cd /
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$ ls
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dir a
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14848514 b.txt
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8504156 c.dat
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dir d
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$ cd a
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$ ls
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dir e
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29116 f
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2557 g
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62596 h.lst
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$ cd e
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$ ls
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584 i
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$ cd ..
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$ cd ..
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$ cd d
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$ ls
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4060174 j
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8033020 d.log
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5626152 d.ext
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7214296 k
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30373
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25512
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65332
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33549
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35390
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File diff suppressed because it is too large
Load Diff
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@ -1,123 +1,10 @@
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#!/usr/bin/env python3
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from typing import Iterable, Optional
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from dataclasses import dataclass
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from functools import reduce
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@dataclass
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class File:
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name: str
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is_dir: bool
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children: dict[str, "File"]
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parent: Optional["File"]
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size: Optional[int]
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class Main:
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def __init__(self, lines: Iterable[str]):
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self.root = File("/",True, {}, None, None)
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self.cwd = self.root
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self.lines = lines
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def handle_cmd(self, cmdlets: list[str]):
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match cmdlets[0]:
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case "cd":
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dest = cmdlets[1]
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match dest:
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case "/":
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self.cwd = self.root
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case "..":
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if not self.cwd.parent:
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return self
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self.cwd = self.cwd.parent
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case _:
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self.cwd = self.cwd.children[dest]
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# validate cwd
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return self
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case "ls":
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return self
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case _:
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raise RuntimeError(f"Unknown command: {cmdlets[0]}")
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def parse(self):
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for _line in self.lines:
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line = _line.strip()
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if len(line) == 0:
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continue
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# print("line:", line)
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if line[0] == "$": # command
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cmdlets = line[1:].split()
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self.handle_cmd(cmdlets)
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continue
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# it's just ls listing, update it to our object storage
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(sz, rel_path) = line.split()
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self.cwd.children[rel_path] = File(name=rel_path,
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is_dir=sz == "dir",
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children={},
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parent=self.cwd,
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size=int(sz) if sz != "dir" else None)
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return self
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def solve(self):
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self.parse()
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def sized(file: File, parent: Optional[File]):
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"""
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alternative file
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"""
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if file.size:
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return file
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retval = File(file.name, file.is_dir, {}, None, None)
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children = {rel_path: sized(f, retval) for rel_path, f in file.children.items()}
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retval.children = children
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retval.parent = parent
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retval.size = sum(c.size for c in children.values())
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return retval
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def sum_with_threshold(sized_file: File, max_sz: int) -> int:
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assert sized_file.size is not None
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sz = 0
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if sized_file.size <= max_sz and len(sized_file.children) != 0:
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# print("qual:", sized_file.name)
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sz = sized_file.size
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return sum(sum_with_threshold(c, max_sz) for c in sized_file.children.values()) + sz
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sized_root = sized(self.root, None)
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part1 = sum_with_threshold(sized_root, 100_000)
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print("part1", part1)
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def directories(file: File) -> list[File]:
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if not file.is_dir:
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return []
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return [file] + [dir for f in file.children.values() for dir in directories(f)]
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def upper_bound(sized_file: File, min_sz: int) -> list[File]:
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assert sized_file.size is not None
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if sized_file.size < min_sz or len(sized_file.children) == 0:
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return []
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min_f: File = sized_file
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contests = [c for e in sized_file.children.values() for c in upper_bound(e, min_sz)]
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return [min_f] + contests
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TOTAL=70_000_000
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NEED=30_000_000
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assert sized_root.size is not None
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DELETE=NEED-(TOTAL-sized_root.size)
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print(f"{DELETE=}")
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part2 = upper_bound(sized_root, DELETE)
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p = sorted(part2, key=lambda x: x.size or 0)
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# print("part2 qual:", "\n".join([f"({e.name}, {e.size})" for e in p]))
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print("part2", p[0].size if part2 else "None")
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sorted_dirs = sorted(directories(sized_root), key=lambda x: x.size or 0)
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# Before is_dir: 176 for part 2
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print(f"directories ({len(sorted_dirs)}):")
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print("\n".join(f"{dir.name}\t{dir.size}" for dir in sorted_dirs))
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import sys
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from typing import Iterable
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def main(lines: Iterable[str]):
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Main(list(lines)).solve()
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pass
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if __name__=="__main__":
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import sys
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with open(sys.argv[1], "r") as f:
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main(f)
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