display a difficulty of AtCoder Problems.
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// ==UserScript==
// @name AtCoderDifficultyDisplay
// @namespace https://github.com/hotarunx
// @version 0.1
// @description display a difficulty of AtCoder Problems.
// @author hotarunx
// @match https://atcoder.jp/contests/*/tasks/*
// @grant none
// @require https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
// @connect https://kenkoooo.com/atcoder/resources/*
//
// Copyright(c) 2020 hotarunx
// This software is released under the MIT License, see LICENSE.
//
// ==/UserScript==
(function () {
// URL of Estimated difficulties of the problems
const url = "https://kenkoooo.com/atcoder/resources/problem-models.json";
// get id
const path = location.pathname.split("/");
const id = path[path.length - 1];
// get Element of Problem Status
let element_status
const main_container = document.getElementById('main-container');
const elements_p = main_container.getElementsByTagName("p");
for (let i = 0; i < elements_p.length; i++) {
const element = elements_p[i];
if (element.textContent.match("メモリ制限:") || element.textContent.match("Memory Limit:")) {
element_status = element;
break
}
}
// fetch Information API
this.fetch(url)
.then(function (data) {
return data.json();
})
.then(function (json) {
// search problem
const problem = json[id];
// if problem exist in json
if (problem != null) {
const difficulty = problem.difficulty;
// if difficulty is exist
if (difficulty != null) {
element_status.textContent += " / ";
// add difficulty value
let add_text = "Difficulty: ";
if (problem.is_experimental) add_text += "🧪";
add_text += difficulty.toFixed();
// colorize text
let color = '#FFFFFF'; // white
if (difficulty < 400) color = '#808080'; // gray
else if (difficulty < 800) color = '#804000'; // brown
else if (difficulty < 1200) color = '#008000'; // green
else if (difficulty < 1600) color = '#00C0C0'; // cyan
else if (difficulty < 2000) color = '#0000FF'; // blue
else if (difficulty < 2400) color = '#C0C000'; // yellow
else if (difficulty < 2800) color = '#FF8000'; // orange
else if (difficulty < 3200) color = '#FF0000'; // red
else if (difficulty < 3600) color = '#E4E4E4'; // silver
else /* */ color = '#FFD325'; // gold
const add_span = "<span style='color: " + color + ";'>" + add_text + "</span>";
element_status.innerHTML += add_span;
}
}
})
})();