111 lines
2.6 KiB
Nim
111 lines
2.6 KiB
Nim
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import std/strutils
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import std/sequtils
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import std/algorithm
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import std/re
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type
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DirEntry = ref object
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parent: DirEntry
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name: string
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dirs: seq[DirEntry]
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files: seq[FileEntry]
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FileEntry = ref object
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name: string
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size: int
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proc mkcd(a: DirEntry, name: string): DirEntry =
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for i in 0.. (a.dirs.len() - 1):
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if a.dirs[i].name == name:
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return a.dirs[i]
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a.dirs.add(DirEntry(parent: a, name: name, dirs: @[], files: @[]))
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return a.dirs[len(a.dirs)-1]
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proc recursive_size(a: DirEntry): int =
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var sz = 0
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for d in a.dirs:
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sz += d.recursive_size()
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for f in a.files:
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sz += f.size
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return sz
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proc sum_size_sub(a: DirEntry, max: int): int =
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let sz = a.recursive_size()
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var res = 0
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if sz < max:
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res += sz
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for d in a.dirs:
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res += d.sum_size_sub(max)
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return res
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proc print(a: DirEntry, indent: int) =
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echo ' '.repeat(indent*2), a.name, " (sz = ", a.recursive_size(), " )"
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echo ' '.repeat(indent*2), "{"
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for f in a.files:
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echo ' '.repeat(indent*2+2), "[F] ", f.name, " (sz = ", f.size, " )"
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for d in a.dirs:
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d.print(indent+1)
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echo ' '.repeat(indent*2), "}"
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proc collect_dirs(a: DirEntry, coll: var seq[DirEntry]) =
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coll.add(a)
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for d in a.dirs:
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coll.add(d)
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d.collect_dirs(coll)
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proc run07_2(): string =
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const input = staticRead"../input/day07.txt"
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let lines = splitLines(input).filter(proc(p: string): bool = p != "")
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var root = DirEntry(parent: nil, name: "/", dirs: @[], files: @[])
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var curr = root
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for line in lines:
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if line == "$ cd ..":
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curr = curr.parent
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elif line.startsWith("$ cd "):
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curr = curr.mkcd(line.substr(5))
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elif line == "$ ls":
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continue
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elif line.startsWith("dir "):
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discard curr.mkcd(line.substr(4))
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elif line.match(re"^[0-9].*"):
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let split = line.split(" ")
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curr.files.add(FileEntry(name: split[1], size: parseInt(split[0])))
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else:
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echo "UNKNOWN LINE: " & line
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# echo root.recursive_size()
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# root.print(0)
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var dirs: seq[DirEntry] = @[]
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root.collect_dirs(dirs)
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proc scmp(a, b: DirEntry): int =
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if a.recursive_size() < b.recursive_size(): -1
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else: 1
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dirs.sort(scmp)
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let min_size = -(70000000 - 30000000 - root.recursive_size())
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# echo min_size
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for d in dirs:
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if d.recursive_size() > min_size:
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return intToStr(d.recursive_size())
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return "ERR"
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when not defined(js):
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echo run07_2()
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else:
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proc js_run07_2(): cstring {.exportc.} =
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return cstring(run07_2())
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