My solutions for CTFs
Daliy AlpacaHack 2026/1/1
Takumi Akimoto
(Jan 2, 2026, 10:53 PM +0900)
3c46e9ed
499bdae0
+109
+8
alpacahack/daily/happy-new-year/deno.json
+8
alpacahack/daily/happy-new-year/deno.json
+57
alpacahack/daily/happy-new-year/deno.lock
+57
alpacahack/daily/happy-new-year/deno.lock
···
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+
{
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"version": "5",
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"specifiers": {
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"jsr:@b-fuze/deno-dom@~0.1.56": "0.1.56",
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"jsr:@denosaurs/plug@1.1.0": "1.1.0",
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"jsr:@std/encoding@1": "1.0.10",
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"jsr:@std/fmt@1": "1.0.8",
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"jsr:@std/fs@1": "1.0.21",
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"jsr:@std/internal@^1.0.12": "1.0.12",
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"jsr:@std/path@1": "1.1.4",
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"jsr:@std/path@^1.1.4": "1.1.4"
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},
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"jsr": {
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"@b-fuze/deno-dom@0.1.56": {
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"integrity": "8030e2dc1d8750f1682b53462ab893d9c3470f2287feecbe22f44a88c54ab148",
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"dependencies": [
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"jsr:@denosaurs/plug"
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]
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},
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"@denosaurs/plug@1.1.0": {
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"integrity": "eb2f0b7546c7bca2000d8b0282c54d50d91cf6d75cb26a80df25a6de8c4bc044",
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"dependencies": [
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"jsr:@std/encoding",
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"jsr:@std/fmt",
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"jsr:@std/fs",
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"jsr:@std/path@1"
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]
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},
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"@std/encoding@1.0.10": {
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"integrity": "8783c6384a2d13abd5e9e87a7ae0520a30e9f56aeeaa3bdf910a3eaaf5c811a1"
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},
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"@std/fmt@1.0.8": {
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"integrity": "71e1fc498787e4434d213647a6e43e794af4fd393ef8f52062246e06f7e372b7"
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},
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"@std/fs@1.0.21": {
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"integrity": "d720fe1056d78d43065a4d6e0eeb2b19f34adb8a0bc7caf3a4dbf1d4178252cd",
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+
"dependencies": [
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"jsr:@std/internal",
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"jsr:@std/path@^1.1.4"
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]
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},
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"@std/internal@1.0.12": {
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"integrity": "972a634fd5bc34b242024402972cd5143eac68d8dffaca5eaa4dba30ce17b027"
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},
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+
"@std/path@1.1.4": {
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"integrity": "1d2d43f39efb1b42f0b1882a25486647cb851481862dc7313390b2bb044314b5",
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+
"dependencies": [
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+
"jsr:@std/internal"
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]
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}
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},
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"workspace": {
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"dependencies": [
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"jsr:@b-fuze/deno-dom@~0.1.56"
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]
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}
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}
+44
alpacahack/daily/happy-new-year/solve.ts
+44
alpacahack/daily/happy-new-year/solve.ts
···
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import { DOMParser } from "@b-fuze/deno-dom"
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const TARGET = "alpacahack"
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const document = await fetch(
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"https://en.wikipedia.org/wiki/List_of_animal_names",
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)
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.then((res) => res.text())
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.then((html) => new DOMParser().parseFromString(html, "text/html"))
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const animalNames = new Set<string>()
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const tables = document.querySelectorAll("table.wikitable")
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for (const table of tables) {
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const rows = table.querySelectorAll("tr")
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for (const row of rows) {
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const firstCell = row.querySelector("td")
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if (!firstCell) {
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continue
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}
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const link = firstCell.querySelector("a")
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if (link) {
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const animalName = link.textContent.trim().toLowerCase()
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animalNames.add(animalName)
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}
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}
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}
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const candidates: string[] = []
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for (let i = 0; i < TARGET.length; i++) {
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for (let j = i + 1; j <= TARGET.length; j++) {
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const sub = TARGET.slice(i, j)
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if (animalNames.has(sub)) {
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candidates.push(sub)
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}
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}
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}
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console.log(candidates)