The main reason why we have so many different kinds of data structures is that they are designed to solve a specific problem and in most cases, there is no one-size-fits-all solution.
2. There’s always a tradeoff between space and time complexity when it comes to the choice of data structure: you can either use an array (fast access, but limited size) or linked list (slow access, but unlimited size). In some cases you might need both – like for example if you want to store items with their weight in a sorted way without having them all on one single line
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