# 记一次有意思的种树比赛
在招聘群里有位老哥发了个网址`http://geek.qq.com/tree/`，发现挺好玩，别说这玩意还真让人极其上头哈哈。这次种树实际上就是类似于一个闯关游戏，种树种到一定数量就会出现新的玩法，当然我也是个小菜鸡，弄了`100w`就种不下去了。在我玩的这几关就需要解密混淆的`js`等等一些操作，还是挺好玩的，注意这边是成功种一棵树后才能继续种下一棵树，因此开多线程并行刷接口没有意义。

## 第一关
第一关是`1-1w`棵树，第一关还是很简单的，就是一个简单的发起请求，数组中就只有一个值，把这个值取出来再请求携带回去就好，实际上这个闯关游戏的处理都是在这边中间的处理过程。

```javascript
/**
pull示例
http://159.75.70.9:8081/pull?u=0000081082CCDB14682A1505892071B1
返回示例
{"c":"A274075A","a":[73513],"t":"000010510000000086A11C1156D6202A"}

push示例
http://159.75.70.9:8081/push?t=000010510000000086A11C1156D6202A&a=73513
返回示例
{"success":1,"score":1}
```

实际上闯关的时候处理的只需要关注这个`a`即可，这个值就是从上边`push`的数组中取得的，所以直接`pop`即可。

```javascript
var f = function(obj){
    return new Promise(resolve => {
        resolve(obj.a.pop());
    })
}

while(true){
    try{
        let token = "0000081082CCDB14682A1505892071B1"
        let pull = await (await fetch(`${cgi}/pull?u=${token}`)).json();
        let val = await f(pull);
        let push = await (await fetch(`${cgi}/push?t=${pull.t}&a=${val}`)).json();
        console.log(push);
        if(!push.success) throw push;
    }catch(e){
        break;
    }
}
// 注：变量cgi已在全局定义
```

## 第二关
第二关是`1w-10w`棵树，实际上当请求第一次之后，会根据返回的`push`对象中的`c`属性的值动态插入一个`<script>`实现一个函数挂在到全局`window`然后再调用这个函数去计算`push`该提交的值，当然这边的计算要么是给你一个长延时要么就是一个很耗时的循环操作，让你去自己有优化实现再去加速种树。

```javascript
/**
pull示例
http://159.75.70.9:8081/pull?u=0000081082CCDB14682A1505892071B1
返回示例
{"c":"A3C2EA99","a":[79124],"t":"00001051000100011B214AC36A8E9369"}

push示例
http://159.75.70.9:8081/push?t=00001051000100011B214AC36A8E9369&a=6260686500
返回示例
{"success":1,"score":10002}
```

此时动态加载的`js`是这个样子的。

```javascript
// http://159.75.70.9:8080/A3C2EA99.js
window.A3C2EA99=async function({a}){return new Promise(_=>setTimeout(__=>_(a[0]*a[0]+a[0]),2000))}
```
实际上看起来就是计算了`a[0]*a[0]+a[0]`，但是如果直接调用这个方法会有大约`2s`的延迟，所以我们需要自己优化。

```javascript
var f = function(obj){
    return new Promise(resolve => {
        const a = obj.a.pop();
        resolve(a*a+a);
    })
}

while(true){
    try{
        let token = "0000081082CCDB14682A1505892071B1"
        let pull = await (await fetch(`${cgi}/pull?u=${token}`)).json();
        let val = await f(pull);
        let push = await (await fetch(`${cgi}/push?t=${pull.t}&a=${val}`)).json();
        console.log(push);
        if(!push.success) throw push;
    }catch(e){
        break;
    }
}

// 注：变量cgi已在全局定义
```

## 第三关
第三关是`10w-25w`棵树，此时的`js`就开始向着加密混淆发展了。

```javascript
/**
pull示例
http://159.75.70.9:8081/pull?u=0000081082CCDB14682A1505892071B1
返回示例
{"c":"A5473788","a":[359,626,105471],"t":"0000105100100000072FD4E99C75A6C6"}

push示例
http://159.75.70.9:8081/push?t=0000105100100000072FD4E99C75A6C6&a=17923
返回示例
{"success":1,"score":100001}
```

此时动态加载的`js`是这个样子的。

```javascript
eval(atob("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"))
```

当然这只是个`base64`编码，我们把他解开就可以看到源代码的实现了。

```javascript
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;
};
```

在这个`js`中有非常耗时的循环操作，看这个`0x30d3f = 199999`并且内部还有一个`for`就知道了，但是我们可以精简这个循环与整个代码，让我们种树种的更快。

```javascript
var f = function(_0x335437) {
    var _0x1aac02 = 0x30d3f;
    for (var _0x3bed6a = 0x30d3f; _0x3bed6a > 0x0; _0x3bed6a--) {
        var _0x375340 = _0x335437['a'][0x0] * _0x3bed6a;
        _0x375340 % _0x335437['a'][0x2] == _0x335437['a'][0x1] && _0x3bed6a < _0x1aac02 && (_0x1aac02 = _0x3bed6a);
    }
    return _0x1aac02;
};

while(true){
    try{
        let token = "0000081082CCDB14682A1505892071B1"
        let pull = await (await fetch(`${cgi}/pull?u=${token}`)).json();
        let val = await f(pull);
        let push = await (await fetch(`${cgi}/push?t=${pull.t}&a=${val}`)).json();
        console.log(push);
        if(!push.success) throw push;
    }catch(e){
        break;
    }
}

// 注：变量cgi已在全局定义
```

## 第四关
第四关是`25w-50w`棵树，这个`js`就更加让人难受了，全是`[]`的混淆。

```javascript
/**
pull示例
http://159.75.70.9:8081/pull?u=0000081082CCDB14682A1505892071B1
返回示例
{"c":"A593C8B8","a":[649,2356,222,1344,506,1797,840],"t":"000008100036230024B0D39DA416E5DD"}

push示例
http://159.75.70.9:8081/push?t=000008100036230024B0D39DA416E5DD&a=151231471
返回示例
{"success":1,"score":250001}
```

此时动态加载的`js`是这个样子的。

```javascript
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_____=function*(){while([])yield[(_,__)=>_+__,(_,__)=>_-__,(_,__)=>_*__][++__%(!+[]+!+[]+!+[])][(+(+!+[]+[+!+[]]))[(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(+![]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(+![]+[![]]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]](!+[]+!+[]+[+[]])+([![]]+[][[]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+([][[]]+[])[!+[]+!+[]]](+[],___,____)}();let ______=function(_____,______,_______){____=_____;___=______[([][[]]+'')[+!+[]]+(!![]+'')[+!+[]+!+[]+!+[]]+(+(+!+[]+[+[]]+[+!+[]]))[(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(+![]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(+![]+[![]]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]](!+[]+!+[]+!+[]+[!+[]+!+[]+!+[]+!+[]])[+!+[]]+(!![]+'')[+[]]]()[(+(!+[]+!+[]+!+[]+[+!+[]]))[(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(+![]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(+![]+[![]]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]](!+[]+!+[]+!+[]+[!+[]+!+[]])+(![]+[])[+!+[]]+(![]+[])[!+[]+!+[]]+([][[]]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]]();__==_[(![]+'')[+!+[]]][(![]+[])[!+[]+!+[]]+(!![]+[])[!+[]+!+[]+!+[]]+([][[]]+[])[+!+[]]+(+![]+[![]]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]+(!![]+[])[+[]]+(+(+!+[]+[+[]]+[+!+[]]))[(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(+![]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(+![]+[![]]+([]+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]](!+[]+!+[]+[+!+[]])[+!+[]]]&&_______(-___)};return new 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```

看起来很让人难受，对于这个混淆，我们将其中的自执行函数处理一下，让其生成调用的函数名就比较明朗了，这里不得不说`vscode`真好用，在这里我为了便于测试还有一些其他的代码，现在对于这个混淆的代码就有一个整体的了解了。


```javascript
var f = async(_)=>(($,obj,__,___,____)=>{
    let _____ = function*() {
        while([]){
            console.log(__, ___, ____);
            yield[(_,__)=>_ + __, (_,__)=>_ - __, (_,__)=>_ * __][++__ % 3]["bind"](0, ___, ____)
        }
    }();
    let fff = function(_____, fff, ffff) {
        ____ = _____;
        ___ = fff["next"]()["value"]();
        console.log(___)
        __ == obj["a"]["length"] && ffff(-___)
    };
    return new Promise(__=>obj["a"]["forEach"](___=>$["setTimeout"](____=>{fff(___, _____, __);}, ___)))
}
)(typeof window === "undefined" ? global : window, _, +[], +[], +[])


f({"c":"A593C8B8","a":[1205,890,624,1689,389,144,2129],"t":"0000081000250018B3E6669F59D9A3EF"}).then(res => console.log(res))
// 67820250
```

在此处不得不吐槽一句，为了混淆这个文件真的变得好大，处理完了才这么一点代码，还有就是这个代码用生成器搞了个类似于那个使用`Java`多线程去排序的计算方法(当然`js`是单线程的)，去搞时间延迟阻止我们种树，这里我们就根据他的逻辑自己实现一下计算方式。

```javascript
var f = function(obj){
    return new Promise(resolve => {
        let counter = 0;
        obj.a.sort((a, b) => a-b);
        obj.a.forEach((v, i) => {
            const operater = [(_,__)=>_ + __, (_,__)=>_ - __, (_,__)=>_ * __][(i+1) % 3];
            counter = operater(counter, v);
        })
        resolve(-counter);
    })
}

while(true){
    try{
        let token = "0000081082CCDB14682A1505892071B1"
        let pull = await (await fetch(`${cgi}/pull?u=${token}`)).json();
        let val = await f(pull);
        let push = await (await fetch(`${cgi}/push?t=${pull.t}&a=${val}`)).json();
        console.log(push)
        if (!push.success) throw push;
    }catch(e){
        break;
    }
}

// 注：变量cgi已在全局定义
```

## 第五关
第五关是`50w-100w`棵树，第五关突然出来了一个`WebAssembly`也就是`wasm`，这个是真没用过，着实把我看傻了，虽然没了解过但是硬刚了一波，晚上恶补了一波指令，过了`50w`这一关。

```javascript
/**
pull示例
http://159.75.70.9:8081/pull?u=0000081082CCDB14682A1505892071B1
返回示例
{"c":"A661E542","a":[334562437,6452978],"t":"0000081000666290FA5B0B81481B32CD"}

push示例
http://159.75.70.9:8081/push?t=0000081000666290FA5B0B81481B32CD&a=334562804
返回示例
{"success":1,"score":500006}
```

此时动态加载的`js`是这个样子的。


```javascript
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)}
```

使用了这个`WebAssembly`我也是头疼了半天，搜索了很多教程都得新安装一个软件进行反编译，然后我自己在不断尝试下发现谷歌浏览器可以直接查看甚至调试，不得不说谷歌浏览器还是牛逼啊。

```javascript
var f = async function({a:A}){
    const fetcher = await fetch("data:application/octet-binary;base64,AGFzbQEAAAABBwFgAn9/AX8CFwIETWF0aANtaW4AAARNYXRoA21heAAAAwIBAAcHAQNSdW4AAgpgAV4BBn8gACECIAFBAWsiBARAA0AgAiEDQQAhBkEKIQcDQCADQQpwIQUgA0EKbiEDIAUgBhABIQYgBSAHEAAhByADQQBLDQALIAIgBiAHbGohAiAEQQFrIgQNAAsLIAIL");
    const buffer = await (fetcher).arrayBuffer();
    const compiler = await WebAssembly.compile(buffer);
    const instantiate = (await WebAssembly.instantiate(compiler, {Math:Math}));
    console.log(instantiate.exports); // 查看Run方法的[[FunctionLocation]]
    return instantiate.exports.Run(...A)
}

console.log(f({"c":"A661E542","a":[116823665, 6153003],"t":"0000081000500002F1D882C546C34290"}).then(res => console.log(res)));
// 116823707
// https://www.wasm.com.cn/docs/semantics/#32-bit-integer-operators
```

```wasm
(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
  )
)
```

最后慢慢`debug`然后用`js`模拟实现了一下这个`wasm`的操作，运行速度会快得多，然后这一关就闯过了，这个栈式语言也还是挺好玩的。

```javascript
var f = async function({a:A}){
    let $var0 = A[0];
    let $var1 = A[1];
    let $var2 = $var0;
    let $var4 = $var1-1;

    let $var3=0, $var5=0, $var6=0, $var7=0;
    while(1){
        $var3 = $var2;
        $var6 = 0;
        $var7 = 10;
        while(1){
            $var5 = $var3 % 10;
            $var3 = ($var3 / 10) >> 0;
            $var6 = Math.max($var5, $var6);
            $var7 = Math.min($var5, $var7);
            if($var3 <= 0) break; 
        }
        $var2 = $var6 * $var7 + $var2;
        $var4--;
        if($var4 <= 0) break;
    }
    return $var2;
}

while(true){
    try{
        let token = "0000081082CCDB14682A1505892071B1"
        let pull = await (await fetch(`${cgi}/pull?u=${token}`)).json();
        let val = await f(pull);
        let push = await (await fetch(`${cgi}/push?t=${pull.t}&a=${val}`)).json();
        console.log(push)
        if (!push.success) throw push;
    }catch(e){
        break;
    }
}

// // 注：变量cgi已在全局定义
```

## 总结
虽然写这个极其上头，但是还有很多事没做，比如老师给的论文下周要做汇报，玩了一下午先不玩了，在我写下这篇文章的时候已经有大佬种到`200w`棵了，我才种了`100w`，然后排行是`82`，在此仰望大佬们哈哈。

## Blog

```
https://github.com/WindRunnerMax/EveryDay/
```