// ==UserScript==
// @name         信友队 Better!
// @namespace    http://tampermonkey.net/
// @version      0.1.1
// @description  优化信友队
// @author       Andy_hpy
// @match        *://*.xinyoudui.com/*
// @icon         https://www.xinyoudui.com/xyd_icon.png
// @grant        none
// ==/UserScript==

function main() {
    var pattern = /^http[s]?:\/\/(contest\.|www\.|)xinyoudui\.com\/(ac\/)?contest\/[A-Z\d]+\/problem\/\d+$/;
    var url = location.href;
    if (pattern.test(url)) {
        alert('In Problem Page');
    }
}

(function() {
    'use strict';
    const wait = setInterval(() => {
        const place = document.querySelector("html");
        if (place) {
            clearInterval(wait);
            main();
        }
    }, 500);
})();