优化：如果某轮没有发生交换，说明已有序，提前结束
圖像來源，Muskaan Kataria
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Георгий Асастрянзамдиректора Центра ИМВЭС НИУ ВШЭ, доцент РЭУ им. Г.В. Плеханова
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Specify a footer that calls the main method in the generated file as we are not using the bundled file as a module. Usually the footer is used for adding comments and there might be a better way of doing this that I am not aware of. This however serves the purpose very well.
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