tamper monkey script coding

cfShowLang.js

// ==UserScript==
// @name         CF show lang
// @namespace    mdtareque
// @version      0.4
// @description  try to take over the world!
// @author       Md Tareque Khan
// @match        https://codeforces.com/contest/*standings*
// @grant        none
// ==/UserScript==
/*
0.1 : show languages on standing page
0.2 : delete 'GNU' part to reduce noise for c++
0.3 : show languages during system testing
0.4 : handle locked submission
*/
(function() {
    'use strict';
    var getUpdatedTitle = function(lang) {
        console.log("lang1 " + lang);
        lang = lang.substring(lang.lastIndexOf(',')+2);
        console.log("lang2 " + lang);
        if(lang.startsWith("GNU"))
            lang = lang.substring(4);
        return lang;
    };
    var updateNode = function(node) {
        var oldText = node.children[1].innerHTML;
        var lang = getUpdatedTitle(node.title);
        node.children[1].innerHTML = oldText + " " + lang;
    };
    $("[problemid][title] .cell-accepted").each(function() {
        updateNode($(this).parent()[0]);
    });

    $("[problemid][title] .cell-passed-system-test").each(function() {
        updateNode($(this).parent()[0]);
    });

    $("[problemid][title] .cell-accepted-locked").each(function() {
        updateNode($(this).parent()[0]);
    });

})();

CJ_download.js

// ==UserScript==
// @name         me download solution cj
// @namespace    mtk
// @version      0.1
// @description  download solution cj
// @author       You
// @match        https://codingcompetitions.withgoogle.com/*/submissions/*
// @grant        none
// @require      https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...


     var addHtml = function() {
         $('<style type="text/css">  \
#mtk-download {  \
cursor: pointer; \
position:fixed; \
z-index: 10;\
top: 200px;\
right: 10px;\
border: 1px solid black;\
padding: 15px;\
}\
</style>\
<button id="mtk-download">Download solutions</div>').appendTo('body');
     };

    addHtml();
    $("#mtk-download").click(function() {
        console.log("Clicked download...");
        $(".download-button").each(function() {
            var t = $(this);
            console.log(t);
            t.click();
        } );
    });
})();

codejam langs/user
eatmore, how you lewin - java
cakewalk, epic_time - python