"Make it fast" means you should use better algorithms or data structures to solve the problem. Because as you know, to solve one problem, there're many ways to do it. So it's also called optimization of the code to use better libraries, for example.
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How can you make your code faster?
"Make it fast" means you should use better algorithms or data structures to solve the problem. Because as you know, to solve one problem, there're many ways to do it. So it's also called optimization of the code to use better libraries, for example.