Remove all elements except the contest title from "Joined Contests" and set the six checkboxes.
// ==UserScript==
// @name VirtualContestUpSolver
// @namespace https://kenkoooo.com/atcoder/
// @version 1.0
// @description Remove all elements except the contest title from "Joined Contests" and set the six checkboxes.
// @author G4NP0N
// @match https://kenkoooo.com/atcoder/*
// @grant none
// ==/UserScript==
var script = document.createElement("script");
script.setAttribute("type","text/javascript");
script.innerText='function RemoveHead(thead) { console.log("thead remove"); thead.remove();}function ReWrite(table) { contests = table.children; for (var i = 0; i < contests.length; i++) { for (var j = 0; j < 5; j++) { contests[i].children[1].remove(); } var contestid = contests[i].getElementsByTagName("a")[0].getAttribute("href"); for (var j = 1; j <= 6; j++) { td = document.createElement("td"); html = "<input> " + String(j); td.innerHTML = html; problemid = contestid + "_" + String(j); var cb = td.children[0]; cb.setAttribute("type", "checkbox"); cb.setAttribute("id", problemid); cb.setAttribute("onchange", "Check(this.id)"); if (!localStorage.getItem(problemid)) { localStorage.setItem(problemid, "false"); } else { if (localStorage.getItem(problemid) === "true") { cb.setAttribute("checked", "checked"); td.setAttribute("style", "background-color:#c3e6cb"); } } contests[i].appendChild(td); } } contests[0].getElementsByTagName("td")[0].setAttribute("style", "width:50%;"); contests[0].setAttribute("class", "rewrited"); console.log("rewrited!");}function Check(id) { var parent = document.getElementById(id).parentElement; if (localStorage.getItem(id) === "true") { localStorage.setItem(id, "false"); parent.setAttribute("style", "background-color:" + window.getComputedStyle(parent.children[0]).backgroundColor); } else { localStorage.setItem(id, "true"); parent.setAttribute("style", "background-color:#c3e6cb"); }}var observer = new MutationObserver(function (mutations) { if (location.href === "https://kenkoooo.com/atcoder/#/login/user/contests") { console.log("rewrite check"); theads = document.getElementsByTagName("thead"); if (theads.length > 1) { RemoveHead(theads[1]); } if (document.getElementsByTagName("tbody").length < 2) return; var table = document.getElementsByTagName("tbody")[1]; if (table.children[0].childElementCount == 1) { return; } if (table.children[0].getAttribute("class") === "rewrited") return; ReWrite(table); }});observer.observe(document, { childList: true, subtree: true });';
document.getElementsByTagName("body")[0].appendChild(script);