The doc is great! Hoewever some areas are still missing.
C++11 intoduced raw string literals: https://en.cppreference.com/w/cpp/language/string_literal

It is useful in many different areas, like strings with quotes, multiline strings and for example windows paths without escaping backslashes:

const char win_path[] = R"(c:\some\unescaped\path)";

The same cppreference link als

Required skills: Python, maybe Cython

Difficulty: Medium

The openage converter is able to optimize the compression for created PNG files by utilizing a search algorithm inspired by OptiPNG. To do this, the search algorithm first tries 8 different compression settings by creating PNGs with these settings in-memory. The compression settings that produ

你的功能请求与使用中遇到的麻烦有关吗？若有，请描述？

为了防止订阅链接被墙，qv2ray带有通过代理更新的功能，但是使用这个功能有一定缺陷。参考下列情景。（使用通过代理更新均默认使用Qv2ray自己创建的代理）
1.小明有两个订阅链接，一个是被墙的A，一个是未被墙的B，但是B的安全策略会拒绝大多数已知VPS服务商的IP
为了更新被墙的A，小明打开了通过代理更新。
成功更新A后，小明去更新B，但是B的安全策略拒绝了小明的更新，小明需要打开首选项去掉通过代理更新才成功

2.小明有1个订阅链接A，这个链接被墙了，于是小明一直是打开通过代理更新的，而使用的代理也是链接A的代理。
有一天，订阅链接A的服务器全部被墙了。小明找好基友小王借来了一个未被墙的订阅链接B，但是小明发现更新不出来，原因是服务器尝试去连接QV2ray的代理，但是现在它并没有配置上可用代理，于是小明又需

Names map and input are exchanged mistakenly. By sense of Preconditions paragraph they have to be exchanged I suppose, because there is no problem when map and result coincide (in current context).