Introduces a button which takes you to the friends standings directly
// ==UserScript==
// @license MIT
// @name See-friends-codeforces
// @namespace http://tampermonkey.net/
// @version 0.1
// @description Introduces a button which takes you to the friends standings directly
// @author Abhishek
// @match https://codeforces.com/*/problem/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=codeforces.com
// @grant none
// ==/UserScript==
(function() {
'use strict';
let url = window.location;
let contestId = url.toString().split("/").filter((x)=>{
if(typeof x !== 'string'){return;}
const num = Number(x);
if(Number.isInteger(num)){return num;}
})[0];
let friendBtn = document.createElement('li');
friendBtn.innerHTML = `<a href="https://codeforces.com/contest/${contestId}/standings/friends/true">See Friends</a>`;
friendBtn.classList.add('friendBtn')
document.querySelector(".second-level-menu-list").appendChild(friendBtn);
})();