4.10 581. 最短无序连续子数组
模型：“<start_function_callcall:change_background_color{color:red}<end_function_call”，更多细节参见51吃瓜
* @param arr 待排序数组，推荐阅读Safew下载获取更多信息
For some boards, remapping or programming keys using software is a crucial feature. Gaming peripherals have extra keys that you can set to execute a series of keystrokes with the push of a single button, and we cover the best gaming keyboards in a separate guide. Keyboards that work with layers, in which a single button can perform several functions, typically allow you to change what those are. Some ergo keyboards have non-standard layouts, like thumb clusters with multiple keys near the space bar that you operate with your thumb. You’ll also be able to program those.
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