display a difficulty of AtCoder Problems.
Versione datata
// ==UserScript==
// @name AtCoderDifficultyDisplay
// @namespace https://github.com/hotarunx
// @version 0.2
// @description display a difficulty of AtCoder Problems.
// @description:ja AtCoder ProblemsのDifficultyを表示します。
// @author hotarunx
// @match https://atcoder.jp/contests/*/tasks/*
// @grant none
// @connect https://kenkoooo.com/atcoder/resources/*
// @license MIT
//
// Copyright(c) 2020 hotarunx
// This software is released under the MIT License, see LICENSE or https://github.com/hotarunx/AtCoderMyExtensions/blob/master/LICENSE.
//
// ==/UserScript==
function getElementOfProblemStatus() {
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
}
}
return element_status;
}
// return rating color
function colorRating(rating) {
let color = '#FFFFFF'; // white
if /**/ (rating < 0400) color = '#808080'; // gray
else if (rating < 0800) color = '#804000'; // brown
else if (rating < 1200) color = '#008000'; // green
else if (rating < 1600) color = '#00C0C0'; // cyan
else if (rating < 2000) color = '#0000FF'; // blue
else if (rating < 2400) color = '#C0C000'; // yellow
else if (rating < 2800) color = '#FF8000'; // orange
else if (rating < 3200) color = '#FF0000'; // red
else if (rating < 3600) color = '#E4E4E4'; // silver
else /* */ color = '#FFD325'; // gold
return color;
}
// correct rating under 400
// see https://qiita.com/anqooqie/items/92005e337a0d2569bdbd#%E6%80%A7%E8%B3%AA4-%E5%88%9D%E5%BF%83%E8%80%85%E3%81%B8%E3%81%AE%E6%85%88%E6%82%B2
function correctLowerRating(rating) {
if (rating >= 400) return rating;
do {
rating = 400 / Math.exp((400 - rating) / 400);
} while (rating < 0);
return rating;
}
function generateDifficultyText(difficulty, is_experimental) {
let text = " / ";
difficulty = correctLowerRating(difficulty)
// add difficulty value
let colored_text = "Difficulty: ";
if (is_experimental) colored_text += "🧪";
colored_text += difficulty.toFixed();
// color difficulty value
const color = colorRating(difficulty);
text += "<span style='color: " + color + ";'>" + colored_text + "</span>";
return text;
}
function addDifficultyText(jsonData) {
let text = "";
// get id
const path = location.pathname.split("/");
const id = path[path.length - 1];
// get Element of Problem Status
let status = getElementOfProblemStatus();
const problem = jsonData[id];
// if problem exist in json
if (problem != null && problem.difficulty != null) {
text += generateDifficultyText(problem.difficulty, problem.is_experimental);
}
status.insertAdjacentHTML('beforeend', text);
}
(function () {
// URL of Estimated difficulties of the problems
const URL = "https://kenkoooo.com/atcoder/resources/problem-models.json";
// fetch Information API
fetch(URL)
.then((response) => response.json())
.then((jsonData) => {
addDifficultyText(jsonData);
});
})();