Codeforces Match Enhancer.

auto insert problem id and language in match.

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name        Codeforces Match Enhancer.
// @namespace   Violentmonkey Scripts
// @match       https://m1.codeforces.com/contest/*/submit
// @match       https://m2.codeforces.com/contest/*/submit
// @match       https://m3.codeforces.com/contest/*/submit
// @grant       none
// @version     1.2
// @author      dianhsu
// @license     MIT
// @run-at      document-idle
// @homepageURL https://greasyfork.org/zh-CN/scripts/484960-codeforces-match-enhancer
// @supportURL  https://github.com/dianhsu/cf-code/issues
// @description auto insert problem id and language in match.
// ==/UserScript==

$(function () {
  'use strict';
  // get problem id from referrer url.
  const re = new RegExp("^https://[0-9a-z]+.codeforces.com/contest/[0-9]+/problem/([0-9a-zA-Z]+)$");
  if (re.test(document.referrer)) {
    let arr = re.exec(document.referrer);
    document.getElementById("problemIndex").value = arr[1];
  } else {
    console.debug("No valid referrer found.")
  }

  // load language from local storage and update selector.
  let lid = localStorage.getItem("programTypeId");
  document.getElementById("programTypeId").value = lid;
  // add event listener to watch selector changes.
  document.getElementById("programTypeId").addEventListener('change', function() {
    console.log('You selected: ', this.value);
    localStorage.setItem("programTypeId", this.value);
  });
});