腾讯极客技术挑战赛 -writeup
发布于: 2021 年 03 月 17 日
故事背景
上周五，偶然在公众号上看到，腾讯正在组织公开的技术活动，腾讯极客技术挑战赛第三期-码上种树（http://geek.qq.com/tree/）。作为一颗不甘寂寞的码农，毅然决定献上自己宝贵的秀发。
规则简述
具体规则可查看上面的 url，这里只做简述。
页面底部，有一个种树的 button。点击后，会触发两次请求。1.GET 方式请求：http://159.75.70.9:8081/pull?u=00000381B7452E9190E5205246B04AA7，获取 json 结果。
{"c":"CA1807EB","a":[1846443],"t":"00000381010000010CC4CAD5C2C6DA39"}复制代码
2.得到结果后，发起第二次请求。http://159.75.70.9:8081/push?t=xxxx&a=xxxxxx。返回结果：
{"success":1,"score":1}复制代码
到现在，几个参数就明确了。u 是当前用户的 token，c 是当前题目的 js 文件名，a 是题面，t 是当前请求的标记。题目就是把第一个接口返回的 a，传入对应的 js 文件中，得到结果。拼接到第二接口中返回。这里边其实还有一个关键点，大家注意规则中 1 秒福利的描述。我猜测，应该会有算法优化的内容，需要将时间复杂度、空间复杂度优化的足够好，才能真正解题。
下面，让我们开始吧。
第一题
参数：{"c":"CA1807EB","a":[1846443],"t":"00000381010000010CC4CAD5C2C6DA39"}
window.A274075A=async function({a}){return new Promise(_=>setTimeout(__=>_(a[0]),2000))}复制代码
这道题不用多说了吧，只需要把数组中 a[0]取出来，传入第二个接口即可。答案懒得贴了，请大家自行脑补。
第二题
参数：{"c":"CA1807EB","a":[1846443,1846443,1846443],"t":"00000381010000010CC4CAD5C2C6DA39"}
第二题，题丢掉了。。。其实也和第一题类似，就是把 a 数组中的元素取出来，加一加，乘一乘。传入第二个接口即可。
直接贴答案。
public static void main(String[] args) throws Exception { while (true) { String request1 = HttpUtil.getRequest("http://159.75.70.9:8081/pull?u=xxxx"); Param1 result1 = JsonUtil.fromJsonString(request1, Param1.class); BigDecimal requestA = new BigDecimal(result1.getA().get(0)); BigDecimal requestB = requestA.multiply(requestA).add(requestA); String requestUrl = "http://159.75.70.9:8081/push?t="+result1.getT()+"&a="+requestB; System.out.println(requestUrl); String request2 = HttpUtil.getRequest(requestUrl); System.out.println(request2); }}复制代码
第三题
参数：{\"c\":\"A5473788\",\"a\":[247,471,130809],\"t\":\"00000381001000129EBADB52B246B486\"}
eval(atob("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"))复制代码
看来前两道都是热身呀，第三道题开始上道了。
首先，明显可以看出，这是给出了一个 base64 字符串，那么我们先用工具解码，看一下这里边到底有什么东西。
var _0xe936 = ['A5473788']; (function(_0x48e85c, _0xe936d8) { var _0x23fc5a = function(_0x2858d9) { while (--_0x2858d9) { _0x48e85c['push'](_0x48e85c['shift']()); } }; _0x23fc5a(++_0xe936d8);} (_0xe936, 0x196));var _0x23fc = function(_0x48e85c, _0xe936d8) { _0x48e85c = _0x48e85c - 0x0; var _0x23fc5a = _0xe936[_0x48e85c]; return _0x23fc5a;};window[_0x23fc('0x0')] = function(_0x335437) { var _0x1aac02 = 0x30d3f; for (var _0x3bed6a = 0x30d3f; _0x3bed6a > 0x0; _0x3bed6a--) { var _0x375340 = 0x0; for (var _0x1ddb77 = 0x0; _0x1ddb77 < _0x3bed6a; _0x1ddb77++) { _0x375340 += _0x335437['a'][0x0]; } _0x375340 % _0x335437['a'][0x2] == _0x335437['a'][0x1] && _0x3bed6a < _0x1aac02 && (_0x1aac02 = _0x3bed6a); } return _0x1aac02;};复制代码
额。。。这个。。。原谅我一个小后端，第一次知道，这个样子的 js 代码，也能在浏览器里运行呀。上边的代码，可以明显的看出，函数中的变量及常量，都是用了 16 进制表示。也就是代码混淆。那么，首先，把简单的部分，如：0x0，0x2，0x1，0x30d3f 还原。然后呢，剩下的，还是一堆乱七八糟的东西。别慌，这里需要你找一个好用一些的编辑器，把代码复制进去，把相同的变量，直接做替换，转为可读，易读的程序。这里我直接贴出我转换后的结果。
function getA(param6) { var param7 = 199999; for (var param8 = 199999; param8 > 0; param8--) { var param9 = 0; param9 = param6[0]*param8; param9 % param6[2] == param6[1] && param8 < param7 && (param7 = param8); } return param7; };复制代码
根据转换结果，大家可以看出，混淆代码中，上边两个函数，完全没有用。他们是来打酱油的，为了增加我们转换的难度，打乱思路。也是为了增加代码的执行时间，防止你直接使用未经转换的 js 代码，直接跑接口，触发 1 秒的种树福利。所以，我就直接把上面的两个函数去掉了。这道题难度其实，还好。只需要你认真细心，把变量做替换即可。这里提一个小技巧，每次转换一个变量，一定要把参数输入进去跑一下，看看输出结果还是否正确，没有问题的话，再继续。这也是反混淆一个很好用的小技巧。
下边是我完整的解题代码。
const request = require('sync-request');while (true) { const res = request('GET', "http://159.75.70.9:8081/pull?u="); const result1 = res.getBody("utf-8"); const result2 = JSON.parse(result1);
const t = result2.t; const a = getA(result2.a); const res2 = request('GET', "http://159.75.70.9:8081/push?t=" + t + "&a=" + a); const result3 = res2.getBody("utf-8"); console.log(result3);
function getA(param6) { var param7 = 199999; for (var param8 = 199999; param8 > 0; param8--) { var param9 = 0; param9 = param6[0]*param8; param9 % param6[2] == param6[1] && param8 < param7 && (param7 = param8); } return param7; };}复制代码
第四题
参数：{\"c\":\"A593C8B8\",\"a\":[138,892,490,1879,1235,588,2281],\"t\":\"0000038100250001E2F75EB23F088E6B\"}
window.A593C8B8=async(_)=>(($,_,__,___,____)=>{let 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]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(+![]+[![]]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]](!+[]+!+[]+[+!+[]])[+!+[]]]&&_______(-___)};return new 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这里展示好像有点问题，只能一行展示呀，我再贴个图，让大家感受一下我的心情。
不废话了，开整。首先把代码格式化一下。
window.A593C8B8 = async(_) = >(($, _, __, ___, ____) = >{ let _____ = function * () { while ([]) yield[(_, __) = >_ + __, (_, __) = >_ - __, (_, __) = >_ * __][++__ % (!+[] + !+[] + !+[])][( + ( + !+[] + [ + !+[]]))[( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( + ![] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]]](!+[] + !+[] + [ + []]) + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ([][[]] + [])[!+[] + !+[]]]( + [], ___, ____) } (); let ______ = function(_____, ______, _______) { ____ = _____; ___ = ______[([][[]] + '')[ + !+[]] + ( !! [] + '')[ + !+[] + !+[] + !+[]] + ( + ( + !+[] + [ + []] + [ + !+[]]))[( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( + ![] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]]](!+[] + !+[] + !+[] + [!+[] + !+[] + !+[] + !+[]])[ + !+[]] + ( !! [] + '')[ + []]]()[( + (!+[] + !+[] + !+[] + [ + !+[]]))[( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( + ![] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]]](!+[] + !+[] + !+[] + [!+[] + !+[]]) + (![] + [])[ + !+[]] + (![] + [])[!+[] + !+[]] + ([][[]] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]]](); __ == _[(![] + '')[ + !+[]]][(![] + [])[!+[] + !+[]] + ( !! [] + [])[!+[] + !+[] + !+[]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( + ( + !+[] + [ + []] + [ + !+[]]))[( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( + ![] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]]](!+[] + !+[] + [ + !+[]])[ + !+[]]] && _______( - ___) }; return new Promise(__ = >_[(![] + '')[ + !+[]]][(![] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]][([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]](( !! [] + [])[ + !+[]] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ([][[]] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + !+[]] + (![] + [ + ![]])[([![]] + [][[]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + (![] + [])[ + !+[]] + (![] + [])[!+[] + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + (![] + [])[!+[] + !+[] + !+[]]]()[ + !+[] + [ + []]] + [ + []] + (![] + [ + ![]])[([![]] + [][[]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + (![] + [])[ + !+[]] + (![] + [])[!+[] + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + (![] + [])[!+[] + !+[] + !+[]]]()[ + !+[] + [ + []]])()[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]] + [])[ + !+[] + [!+[] + !+[]]] + (![] + [])[ + !+[]] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( + ( + !+[] + [ + []] + [ + !+[]]))[( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( + ![] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]]](!+[] + !+[] + [ + !+[]])[ + !+[]]](___ = >$[(![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( + [![]] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]][([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]](( !! [] + [])[ + !+[]] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ([][[]] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + !+[]] + ( + [![]] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + !+[]]] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]][([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]](( !! [] + [])[ + !+[]] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ([][[]] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + !+[]] + ( + [![]] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + !+[]]] + ( !! [] + [])[!+[] + !+[] + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + (![] + [])[ + !+[]] + ( + (!+[] + !+[] + [ + !+[]] + [ + !+[]]))[( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( + ![] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([![]] + [][[]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( + ![] + [![]] + ([] + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]])[!+[] + !+[] + [ + []]]](!+[] + !+[] + !+[] + [ + !+[]])[ + !+[]] + ( !! [] + [])[!+[] + !+[] + !+[]])()(([] + [])[(![] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + ( !! [] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]]()[ + !+[] + [ + !+[]]])[!+[] + !+[]] + (![] + [])[ + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]])()())[!+[] + !+[] + !+[] + [ + []]] + ([![]] + [][[]])[ + !+[] + [ + []]] + (( + [])[([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + !+[]] + (![] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[ + !+[]] + ([][[]] + [])[ + []] + ([][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ( !! [] + [])[ + !+[]]] + [])[ + !+[] + [ + !+[]]] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [][(![] + [])[ + []] + ([![]] + [][[]])[ + !+[] + [ + []]] + (![] + [])[!+[] + !+[]] + ( !! [] + [])[ + []] + ( !! [] + [])[!+[] + !+[] + !+[]] + ( !! [] + [])[ + !+[]]])[ + !+[] + [ + []]] + ([][[]] + [])[ + []] + ( !! [] + [])[ + []]](____ = >______(___, _____, __), ___)))})(window, _, +[], +[], +[])复制代码
可以看出，主要是两个函数_____和______。[]这样的方框简直太乱了，我们先略过。两个函数的，入参出参处分别输出，并打断点调试。可以发现，_____输出为- * +。那么，我们猜测，计算方法，应该和第一个函数输出的运算符有关系。进一步分析发现，______输出的结果，是依次递增增的。那么，我们大胆猜想，可能是把 a 数组排序后，按照运算符的顺序，依次计算结果。（下图是手写的演算过程）。
以上演算过程发现，与接口数据一致。那么，我们直接不看上边的函数了，自己来写一个函数验证一下吧。
下面是完整的解题方法。
const request = require('sync-request');while (true) { const res = request('GET', "http://159.75.70.9:8081/pull?u=xxxx"); const data = res.getBody("utf-8"); const list = JSON.parse(data).a;
const t = JSON.parse(data).t; const a = jisuan(list);
const res2 = request('GET', "http://159.75.70.9:8081/push?t=" + t + "&a=" + a); const result3 = res2.getBody("utf-8"); console.log(result3);}//排序//按顺序生成:- * +//计算function jisuan(list) { for (let i = 0; i < list.length; ++i){ let flag = false; for (let j = 0;j < list.length - i - 1; ++j){ if(list[j] > list[j+1]){ const tmp = list[j]; list[j] = list[j+1]; list[j+1] = tmp; flag = true; } } if(!flag){ break; } }
let result = 0; for (let i = 0; i < list.length; i++){ if(i%3===0){ result = result - list[i]; } if(i%3===1){ result = result * list[i]; } if(i%3===2){ result = result + list[i]; } } return -result;}
复制代码
最后，注意一点是，计算结果都是负数。而接口返回的结果都是正整数。所以，直接加上了负号。（以上代码还有优化空间。只是题目有时间限制，这里还是以通过为目标，我们继续挑战下一个吧）
第五题
参数：{\"c\":\"A661E542\",\"a\":[149497265,7030439],\"t\":\"0000038100500003CDE9EF388A60C2FE\"}
window.A661E542 = async function({a: A}) { return (await WebAssembly.instantiate(await WebAssembly.compile(await (await fetch("data:application/octet-binary;base64,AGFzbQEAAAABBwFgAn9/AX8CFwIETWF0aANtaW4AAARNYXRoA21heAAAAwIBAAcHAQNSdW4AAgpgAV4BBn8gACECIAFBAWsiBARAA0AgAiEDQQAhBkEKIQcDQCADQQpwIQUgA0EKbiEDIAUgBhABIQYgBSAHEAAhByADQQBLDQALIAIgBiAHbGohAiAEQQFrIgQNAAsLIAIL")).arrayBuffer()), { Math: Math })).exports.Run(...A)}复制代码
竟然又是 base64？难道题目重复了？我们解密一下看看。
好吧，竟然是二进制。。。我们再返回头，仔细观察一下 js 文件中的内容，可以发现，这里有个奇奇怪怪的东西，WebAssembly。这是什么？对前端并不太熟悉的我，根本没见过这个。经过一番与 google 亲密友好的交流，给大家简单介绍一下 WebAssembly。
WebAssembly
WebAssembly（缩写为 Wasm）是一种基于堆栈式虚拟机的二进制指令集。Wasm 被设计成为一种编程语言的可移植编译目标，并且可以通过将其部署在 Web 平台上，以便为客户端及服务端应用程序提供服务。
以上是官网对 wasm 的描述。wasm 可以将 C/C++的代码，转为 js 引擎可以运行的字节码。
参考链接：http://www.ruanyifeng.com/blog/2017/09/asmjs_emscripten.html
WAT
WAT 的全称 “WebAssembly Text Format”，我们一般称其为 “WebAssembly 可读文本格式”。它是一种与 Wasm 字节码格式完全等价，可用于编码 Wasm 模块及其相关定义的文本格式。这种文本格式可以被 Wasm 相关的编译工具直接使用，比如 WAVM 虚拟机、Binaryen 调试工具等。不仅如此，Web 浏览器还会在 Wasm 模块没有与之对应的 source-map 数据时（即无法显示模块对应的源语言代码，比如 C/C++ 代码），使用对应的 WAT 可读文本格式代码来作为代替，以方便开发者进行调试。
以上资料来自于：极客时间（WebAssembly 入门课）
回到题目，我们通过浏览器，来看一下浏览器解析出来的 WAT 文本。
(module (func $Math.min (;0;) (import "Math" "min") (param i32 i32) (result i32)) (func $Math.max (;1;) (import "Math" "max") (param i32 i32) (result i32)) (func $Run (;2;) (export "Run") (param $var0 i32) (param $var1 i32) (result i32) (local $var2 i32) (local $var3 i32) (local $var4 i32) (local $var5 i32) (local $var6 i32) (local $var7 i32) local.get $var0 local.set $var2 local.get $var1 i32.const 1 i32.sub local.tee $var4 if loop $label1 local.get $var2 local.set $var3 i32.const 0 local.set $var6 i32.const 10 local.set $var7 loop $label0 local.get $var3 i32.const 10 i32.rem_u local.set $var5 local.get $var3 i32.const 10 i32.div_u local.set $var3 local.get $var5 local.get $var6 call $Math.max local.set $var6 local.get $var5 local.get $var7 call $Math.min local.set $var7 local.get $var3 i32.const 0 i32.gt_u br_if $label0 end $label0 local.get $var2 local.get $var6 local.get $var7 i32.mul i32.add local.set $var2 local.get $var4 i32.const 1 i32.sub local.tee $var4 br_if $label1 end $label1 end local.get $var2 ))复制代码
看起来，和字节码比较类似。参考官网的指令对照表，我们来尝试人肉转换一下。https://webassembly.github.io/spec/core/appendix/index-instructions.html
下边是这里用到的几个指令。
local.tee = local.set
sub = 减法
f32.mul: 乘法
f32.add: 加法
i32.rem_u: 无符号求余
i32.div_u: 无符号除法 (结果 向下求整)
i32.gt_u: 无符号的大于复制代码
分析过程：嵌套里面的循环就是在找,每次生成新数的，param1 的最大数（var6）和最小数（var7），分别赋值(每次循环，var6 和 var7 都要初始化赋值 0 和 10)，这里注意一点，wasm 是栈结构，也可以在浏览器中直接调试，参考调试工具栏右边的 Scope 变量表中变量的变化情况。
下面直接贴出我的答案。
const request = require('sync-request');while (true) { const res = request('GET', "http://159.75.70.9:8081/pull?u=xxxx"); const data = res.getBody("utf-8"); const list = JSON.parse(data).a;
const t = JSON.parse(data).t; const a = jisuan(list[0]+"");
const res2 = request('GET', "http://159.75.70.9:8081/push?t=" + t + "&a=" + a); const result3 = res2.getBody("utf-8"); console.log(result3);}
function jisuan(var0) { let var2 = var0; for (let j = 0;j < 100;j++){ let var3 = var2; let min6 = 0; let max7 = 10; while(var3>0){ let var5 = parseInt(var3)%10; var3 = Math.floor(parseInt(var3)/10); if(var5>min6){min6 = var5} if(var5<max7){max7 = var5} } var2 = parseInt(var2) + (min6 * max7); var2 = var2+""; } return var2;}复制代码
这段代码，已经涉及到了对算法的优化。具体在第一个 for 循环中，原有循环次数是个变量，直接把 a 数组中的变量带入，导致，嵌套循环高达几亿到几十亿次。理论上，我觉得可以直接用 a[0]的 length 作为循环次数就行。实测，这样可能会有个别计算结果不准确，所以，我干脆改成 100 次。既保证了结果正确，也没什么时间损耗。原有 WAT 文本，是导入了 Math 库，用于取出变量 var5，var6 最大最小值。我这里直接手动比较大小。其它一些边边角角没用的逻辑，也去除了一些，就不一一阐述了。
第六题
参数：{\"c\":\"CA1807EB\",\"a\":[1846443,5832672,2104330,4606519,5823104,8701887,2975792,8795965,3061092,4538106,2870395,1840881],\"t\":\"00000381010000010CC4CAD5C2C6DA39\"}
直接贴出 js 文件。
var __TENCENT_CHAOS_STACK = function() { function __TENCENT_CHAOS_VM(f, e, c, r, l, g, s, a) { var n = !r; f = +f, e = e || [0], r = r || [[this], [{}]], l = l || {}; var t = [], o = null, u = [function() { r[r.length - 2] = r[r.length - 2] | r.pop() }, , , function() { for (var o = e[f++], u = [], n = e[f++], t = e[f++], p = [], h = 0; h < n; h++) u[e[f++]] = r[e[f++]]; for (h = 0; h < t; h++) p[h] = e[f++]; r.push(function i() { var n = u.slice(0); n[0] = [this], n[1] = [arguments], n[2] = [i]; for (var t = 0; t < p.length && t < arguments.length; t++) 0 < p[t] && (n[p[t]] = [arguments[t]]); return __TENCENT_CHAOS_VM(o, e, c, n, l, g, s, a) }) }, , function() { r.push(undefined) }, , function() { return ! 0 }, function() { var n = r[r.length - 2]; n[0][n[1]] = r[r.length - 1] }, function() { r.push(!r.pop()) }, , , function() { r.push([e[f++]]) }, function() { r[r.length - 1] = e[f++] }, , function() { r[r.length - 2] = r[r.length - 2] % r.pop() }, function() { r.push("") }, function() { f = e[f++] }, , , , , , , function() { var n = r.pop(); r.push([r[r.pop()][0], n]) }, function() { var n = e[f++]; r[n] = r[n] === undefined ? [] : r[n] }, , , , , , function() { var n = e[f++], t = r[r.length - 2 - n]; r[r.length - 2 - n] = r.pop(), r.push(t) }, function() { var n = e[f++]; r[r.length - 1] && (f = n) }, function() { r.length = e[f++] }, function() { r[r.length - 2] = r[r.length - 2] >= r.pop() }, , , function() { r.pop() }, , , , function() { r[r[r.length - 2][0]][0] = r[r.length - 1] }, , , function() { r[r.length - 2] = r[r.length - 2] * r.pop() }, function() { r.push([c, r.pop()]) }, , , function() { r.push(r[r.pop()[0]][0]) }, , , , function() { var n = e[f++], t = n ? r.slice( - n) : []; r.length -= n; var o = r.pop(); r.push(o[0][o[1]].apply(o[0], t)) }, function() { r.push(r[e[f++]][0]) }, , function() { r.push(e[f++]) }, , function() { var n = r.pop(); r.push(n[0][n[1]]) }, function() { r.push(r[r.length - 1]) }, , , , , function() { r.length -= e[f++] }, , function() { var n = r.pop(), t = r.pop(); r.push([t[0][t[1]], n]) }, function() { r[r.length - 2] = r[r.length - 2] + r.pop() }, , function() { r[r.length - 1] += String.fromCharCode(e[f++]) }]; for (0;;) try { for (var p = !1; ! p;) p = u[e[f++]](); if (0, o) throw o; return n ? (r.pop(), r.slice(3 + __TENCENT_CHAOS_VM.v)) : r.pop() } catch(i) { 0; var h = t.pop(); if (h === undefined) throw i; o = i, f = h[0], r.length = h[1], h[2] && (r[h[2]][0] = o) } } __TENCENT_CHAOS_VM.v = 0; return __TENCENT_CHAOS_VM(0, [33, 3, 25, 2, 16, 68, 119, 68, 105, 68, 110, 68, 100, 68, 111, 68, 119, 45, 16, 68, 67, 68, 65, 68, 49, 68, 56, 68, 48, 68, 55, 68, 69, 68, 66, 65, 17, 2426, 33, 7, 25, 2, 25, 3, 25, 4, 25, 5, 25, 6, 12, 4, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 55, 0, 52, 1, 41, 12, 5, 55, 0, 41, 31, 0, 12, 6, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 55, 1, 52, 1, 41, 31, 0, 63, 6, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 0, 65, 57, 34, 9, 32, 123, 37, 17, 243, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 54, 68, 54, 68, 49, 68, 53, 68, 57, 68, 52, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 103, 12, 5, 55, 0, 41, 31, 0, 37, 37, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 1, 65, 57, 34, 9, 32, 272, 37, 17, 392, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 50, 68, 52, 68, 55, 68, 55, 68, 54, 68, 50, 68, 55, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 252, 12, 4, 58, 48, 53, 6, 66, 41, 31, 0, 12, 4, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 55, 0, 41, 31, 0, 12, 6, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 55, 1, 52, 1, 41, 31, 0, 63, 8, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 2, 65, 57, 34, 9, 32, 511, 37, 17, 631, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 54, 68, 56, 68, 55, 68, 56, 68, 55, 68, 57, 68, 52, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 491, 12, 5, 55, 0, 41, 31, 0, 37, 37, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 3, 65, 57, 34, 9, 32, 660, 37, 17, 780, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 55, 68, 53, 68, 52, 68, 54, 68, 51, 68, 54, 68, 52, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 640, 12, 4, 58, 48, 53, 6, 66, 41, 31, 0, 12, 4, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 55, 0, 41, 31, 0, 12, 6, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 55, 1, 52, 1, 41, 31, 0, 63, 8, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 4, 65, 57, 34, 9, 32, 899, 37, 17, 1019, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 50, 68, 57, 68, 57, 68, 49, 68, 57, 68, 49, 68, 57, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 879, 12, 5, 55, 0, 41, 31, 0, 37, 37, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 5, 65, 57, 34, 9, 32, 1048, 37, 17, 1168, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 50, 68, 49, 68, 56, 68, 50, 68, 54, 68, 52, 68, 51, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 1028, 12, 4, 58, 48, 53, 6, 66, 41, 31, 0, 12, 4, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 55, 0, 41, 31, 0, 12, 6, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 55, 1, 52, 1, 41, 31, 0, 63, 8, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 6, 65, 57, 34, 9, 32, 1287, 37, 17, 1407, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 55, 68, 57, 68, 51, 68, 48, 68, 48, 68, 57, 68, 52, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 1267, 12, 5, 55, 0, 41, 31, 0, 37, 37, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 7, 65, 57, 34, 9, 32, 1436, 37, 17, 1556, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 52, 68, 52, 68, 52, 68, 56, 68, 54, 68, 49, 52, 1, 44, 41, 31, 0, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 58, 48, 58, 31, 1, 31, 0, 55, 1, 66, 41, 37, 13, 0, 31, 0, 0, 63, 5, 37, 17, 1416, 12, 4, 58, 48, 53, 6, 66, 41, 31, 0, 12, 4, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 49, 68, 49, 68, 50, 68, 53, 68, 56, 68, 57, 68, 57, 68, 57, 68, 48, 68, 54, 68, 56, 68, 52, 68, 50, 68, 53, 68, 57, 68, 55, 52, 1, 15, 41, 31, 0, 12, 5, 55, 0, 41, 31, 0, 12, 6, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 55, 1, 52, 1, 41, 31, 0, 63, 8, 12, 5, 48, 12, 3, 16, 68, 97, 24, 55, 8, 65, 57, 34, 9, 32, 1675, 37, 17, 1795, 12, 6, 58, 48, 16, 68, 66, 68, 105, 68, 103, 68, 73, 68, 110, 68, 116, 45, 16, 68, 53, 68, 53, 68, 57, 68, 54, 68, 48, 68, 50, 68, 52, 52, 1, 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这道题彻底没思路了，关键还没办法调试。跑一次，要 78 分钟，才能出结果。run 一下，CPU 直接搞到 100%。以我现在的实力，就到这里了。（据说这是腾讯内部安全团队自研的一套加密工具 TENCENT_CHAOS_VM）
总结
定格
因为到周一了，不能像前两天周末的时候全部时间投入进去解题。所以这次就到这里了。后边官方公布了答案，我会贴在下方。
这次解题过程中，也学习到了非常多前端知识、安全知识，加解密知识。很好玩。
啰嗦一句。
程序员，不要给自己设边界。不管是每日工作的 CRUD，还是计算机基础的数据结构、算法、操作系统。又或是前端、后端、架构、DBA。很多知识是一通百通的。大厂的程序员，小厂的程序员都是写代码，没有高低贵贱之分。很多事情，只要你尝试，就会有收获。共勉。
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发布于: 2021 年 03 月 17 日阅读数: 33
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