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禁止套娃！！ #59

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merged 2 commits into from
Feb 11, 2024
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禁止套娃！！ #59

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7b6585c
禁止套娃!!!
Sallee1 Feb 11, 2024
816f191
禁止套娃!!!v2
Sallee1 Feb 11, 2024
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25 changes: 25 additions & 0 deletions Sallee1/README.md
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# 禁止套娃

## 禁止禁止套娃

### 禁止禁止禁止套娃

#### 禁止禁止禁止禁止套娃

##### 禁止禁止禁止禁止禁止套娃

###### 禁止禁止禁止禁止禁止禁止套娃

创建一个指向自己的符号链接，然后用dir命令递归展开，BOOM

实际上因为cmd的路径有260个字符限制，所以展开到128层就停止了

但是如果有两个指向自己的符号链接呢

理论上就能展开出$\sum_{k=0}^{n}C_{n}^{k} = 2^n$ 条路径

如果n取128，则总共会展开出$3.4028*10^{38}$条路径

当然有点慢就是了，我电脑跑了一个半小时才达到4GB的题目要求

另外要不是因为CMD只能存储一行命令输出，只能用PWSH调用CMD以存储命令输出，如果只用CMD，字符数能更少
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3 changes: 3 additions & 0 deletions Sallee1/a.ps1
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CMD /CMKLINK /D C .
CMD /CMKLINK /D M .
$D = CMD /CDIR /S
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