// ==UserScript==
// @name         信友队 Better!
// @namespace    http://tampermonkey.net/
// @version      0.2.0
// @description  优化信友队
// @author       Andy_hpy
// @match        *://*.xinyoudui.com/*
// @icon         https://www.xinyoudui.com/xyd_icon.png
// @grant        none
// ==/UserScript==

function addcss() {
    var style = document.createElement("style");
    style.innerHTML =`
.btn {
    float: right;
    height: 30px;
    background-color: rgb(96, 165, 250);
    color: white;
    margin: 10px;
    border: 1px solid rgb(96, 165, 250);
    border-radius: 4px;
    cursor: pointer;
}
.btn:hover {
    background-color:rgba(96, 165, 250, 0.8);
}
`;
    document.head.appendChild(style);
}

function getSampleIn() {
    alert(document.querySelector("#problem-statement > div._description_1mrnb_52._problemDescription_gnfoa_43 > div > div > pre:nth-child(9)").innerHTML);
}

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

function main() {
    inProblemPage();
}

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