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waht i know is, It is not directly built-in function in cpp. It is a template function defined in algorithm library. So you can define your own "swap" function. If it is built-in like keywords then you could not do that.
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waht i know is, It is not directly built-in function in cpp. It is a template function defined in algorithm library. So you can define your own "swap" function. If it is built-in like keywords then you could not do that.