116 lines
2.5 KiB
JavaScript
116 lines
2.5 KiB
JavaScript
import input from "fs";
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class File {
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constructor(name, size, parent) {
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this.name = name;
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this.fileSize = size;
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this.parent = parent;
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}
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size() {
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return this.fileSize;
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}
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}
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class Directory {
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constructor(name, parent) {
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this.children = [];
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this.name = name;
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this.parent = parent;
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}
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add(child) {
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this.children.push(child);
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}
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size() {
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return this.children.reduce((acc, child) => acc + child.size(), 0);
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}
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searchDirectoresOfSizePredicate(sizeP) {
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const dirs = [];
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for (const child of this.children) {
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if (child instanceof Directory) {
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if (sizeP(child.size())) {
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dirs.push(child);
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}
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dirs.push(...child.searchDirectoresOfSizePredicate(sizeP));
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}
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}
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return dirs;
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}
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}
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class OS {
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constructor() {
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this.root = new Directory("/", null);
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this.current = this.root;
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}
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cd(path) {
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if (path === "/") {
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this.current = this.root;
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} else if (path === ".." && this.current.parent) {
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this.current = this.current.parent;
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} else {
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this.current = this.current.children.find((child) => child.name === path);
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}
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}
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printFs() {
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const print = (dir, depth) => {
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for (const child of dir.children) {
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console.log(" ".repeat(depth) + child.name);
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if (child instanceof Directory) {
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print(child, depth + 1);
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}
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}
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};
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print(this.root, 0);
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}
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}
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const main = () => {
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const os = new OS();
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const lines = input.readFileSync("input", "utf8").split("\n");
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let currentCommand = null;
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for (const line of lines) {
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if (line.startsWith("$")) {
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const [command, path] = line.split(" ").splice(1);
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if (command == "cd") os.cd(path);
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currentCommand = command;
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} else if (currentCommand == "ls") {
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const [dirOrSize, name] = line.split(" ");
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if (dirOrSize === "dir") {
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const dir = new Directory(name, os.current);
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os.current.add(dir);
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} else {
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const file = new File(name, parseInt(dirOrSize), os.current);
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os.current.add(file);
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}
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}
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}
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//os.printFs();
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console.log(
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os.root
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.searchDirectoresOfSizePredicate((size) => size <= 100000)
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.reduce((a, x) => a + x.size(), 0)
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);
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const rootSize = os.root.size();
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const freeSpace = 70000000 - rootSize;
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console.log(
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[...os.root.searchDirectoresOfSizePredicate(() => true), os.root]
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.map((x) => x.size())
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.filter((x) => freeSpace + x >= 30000000)
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.reduce((a, x) => Math.min(a, x), Infinity)
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);
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};
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main();
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